[TASK] Raise web-vision/deepltranslate-core to ^5.1.1

`ext_emconf.php` dependency is also updated to keep the
dependency chain in sync with `composer.json`.

Used command(s):

```shell
BIN_COMPOSER="$( which composer )" ; \
  ${BIN_COMPOSER} require 'web-vision/deepltranslate-core':'^5.1.1@dev'
```

Author: sbuerk

composer.json

@@ -49,7 +49,7 @@
 		"ext-json": "*",
 		"typo3/cms-backend": "^12.4.2 || ^13.4",
 		"typo3/cms-core": "^12.4.2 || ^13.4",
-		"web-vision/deepltranslate-core": "^5.0.0 || ~5.0@dev"
+		"web-vision/deepltranslate-core": "^5.1.1@dev"
 	},
 	"require-dev": {
 		"friendsofphp/php-cs-fixer": "^3.64",

ext_emconf.php

@@ -15,7 +15,7 @@
             'typo3' => '12.4.0-13.4.99',
             'backend' => '12.4.0-13.4.99',
             'setup' => '12.4.0-13.4.99',
-            'deepltranslate_core' => '5.0.0-5.99.99',
+            'deepltranslate_core' => '5.1.1-5.99.99',
         ],
         'conflicts' => [
             'wv_deepltranslate' => '*',