update sqlc releases to 1.16.0 with darwin arm64 support

[theRealWardo]

I've tested this and it is working well on my m1 macbook pro!

anyone interested in using this can pull my fork while we wait for the merge + release on this project. you can use the following:

load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
git_repository(
    name = "com_plezentek_rules_sqlc",
    branch = "mw-arm",
    remote = "https://github.com/therealwardo/rules_sqlc.git",
)

load("@com_plezentek_rules_sqlc//sqlc:deps.bzl", "sqlc_register_toolchains", "sqlc_rules_dependencies")
sqlc_rules_dependencies()
sqlc_register_toolchains()