encoding/charmap: update UCM spec file URL prefix

UCM spec files used by encoding/maketables.go moved from
source.icu-project.org to github.com, and maketables is failing.

The new repo is at
https://github.com/unicode-org/icu-data/tree/main/charset/data/ucm.

Changed all UCM mappings to use the "raw endpoint" prefix,
https://raw.githubusercontent.com/unicode-org/icu-data/main/charset/data/ucm/….

Fixes golang/go#64504.

Change-Id: Ib2ccf948ad79578efc4a0c356bb25325190dc333
GitHub-Last-Rev: 2a277c7
GitHub-Pull-Request: #48
Reviewed-on: https://go-review.googlesource.com/c/text/+/546576
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dominik Honnef <dominik@honnef.co>

Author: zacharysyoung

encoding/charmap/maketables.go

@@ -39,79 +39,79 @@ var encodings = []struct {
 		"",
 		"CodePage037",
 		0x3f,
-		"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM037-2.1.2.ucm",
+		"https://raw.githubusercontent.com/unicode-org/icu-data/main/charset/data/ucm/glibc-IBM037-2.1.2.ucm",
 	},
 	{
 		"IBM Code Page 437",
 		"PC8CodePage437",
 		"",
 		"CodePage437",
 		encoding.ASCIISub,
-		"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM437-2.1.2.ucm",
+		"https://raw.githubusercontent.com/unicode-org/icu-data/main/charset/data/ucm/glibc-IBM437-2.1.2.ucm",
 	},
 	{
 		"IBM Code Page 850",
 		"PC850Multilingual",
 		"",
 		"CodePage850",
 		encoding.ASCIISub,
-		"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM850-2.1.2.ucm",
+		"https://raw.githubusercontent.com/unicode-org/icu-data/main/charset/data/ucm/glibc-IBM850-2.1.2.ucm",
 	},
 	{
 		"IBM Code Page 852",
 		"PCp852",
 		"",
 		"CodePage852",
 		encoding.ASCIISub,
-		"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM852-2.1.2.ucm",
+		"https://raw.githubusercontent.com/unicode-org/icu-data/main/charset/data/ucm/glibc-IBM852-2.1.2.ucm",
 	},
 	{
 		"IBM Code Page 855",
 		"IBM855",
 		"",
 		"CodePage855",
 		encoding.ASCIISub,
-		"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM855-2.1.2.ucm",
+		"https://raw.githubusercontent.com/unicode-org/icu-data/main/charset/data/ucm/glibc-IBM855-2.1.2.ucm",
 	},
 	{
 		"Windows Code Page 858", // PC latin1 with Euro
 		"IBM00858",
 		"",
 		"CodePage858",
 		encoding.ASCIISub,
-		"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/windows-858-2000.ucm",
+		"https://raw.githubusercontent.com/unicode-org/icu-data/main/charset/data/ucm/windows-858-2000.ucm",
 	},
 	{
 		"IBM Code Page 860",
 		"IBM860",
 		"",
 		"CodePage860",
 		encoding.ASCIISub,
-		"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM860-2.1.2.ucm",
+		"https://raw.githubusercontent.com/unicode-org/icu-data/main/charset/data/ucm/glibc-IBM860-2.1.2.ucm",
 	},
 	{
 		"IBM Code Page 862",
 		"PC862LatinHebrew",
 		"",
 		"CodePage862",
 		encoding.ASCIISub,
-		"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM862-2.1.2.ucm",
+		"https://raw.githubusercontent.com/unicode-org/icu-data/main/charset/data/ucm/glibc-IBM862-2.1.2.ucm",
 	},
 	{
 		"IBM Code Page 863",
 		"IBM863",
 		"",
 		"CodePage863",
 		encoding.ASCIISub,
-		"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM863-2.1.2.ucm",
+		"https://raw.githubusercontent.com/unicode-org/icu-data/main/charset/data/ucm/glibc-IBM863-2.1.2.ucm",
 	},
 	{
 		"IBM Code Page 865",
 		"IBM865",
 		"",
 		"CodePage865",
 		encoding.ASCIISub,
-		"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM865-2.1.2.ucm",
+		"https://raw.githubusercontent.com/unicode-org/icu-data/main/charset/data/ucm/glibc-IBM865-2.1.2.ucm",
 	},
 	{
 		"IBM Code Page 866",
@@ -127,23 +127,23 @@ var encodings = []struct {
 		"",
 		"CodePage1047",
 		0x3f,
-		"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM1047-2.1.2.ucm",
+		"https://raw.githubusercontent.com/unicode-org/icu-data/main/charset/data/ucm/glibc-IBM1047-2.1.2.ucm",
 	},
 	{
 		"IBM Code Page 1140",
 		"IBM01140",
 		"",
 		"CodePage1140",
 		0x3f,
-		"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/ibm-1140_P100-1997.ucm",
+		"https://raw.githubusercontent.com/unicode-org/icu-data/main/charset/data/ucm/ibm-1140_P100-1997.ucm",
 	},
 	{
 		"ISO 8859-1",
 		"ISOLatin1",
 		"",
 		"ISO8859_1",
 		encoding.ASCIISub,
-		"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/iso-8859_1-1998.ucm",
+		"https://raw.githubusercontent.com/unicode-org/icu-data/main/charset/data/ucm/iso-8859_1-1998.ucm",
 	},
 	{
 		"ISO 8859-2",
@@ -207,7 +207,7 @@ var encodings = []struct {
 		"",
 		"ISO8859_9",
 		encoding.ASCIISub,
-		"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/iso-8859_9-1999.ucm",
+		"https://raw.githubusercontent.com/unicode-org/icu-data/main/charset/data/ucm/iso-8859_9-1999.ucm",
 	},
 	{
 		"ISO 8859-10",
@@ -477,7 +477,7 @@ func main() {
 		switch {
 		case strings.HasPrefix(e.mapping, "http://encoding.spec.whatwg.org/"):
 			e.mapping = getWHATWG(e.mapping)
-		case strings.HasPrefix(e.mapping, "http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/"):
+		case strings.HasPrefix(e.mapping, "https://raw.githubusercontent.com/unicode-org/icu-data/main/charset/data/ucm/"):
 			e.mapping = getUCM(e.mapping)
 		}