chore(deps): point dev-dep repositories at public GitHub mirror instead of Forgejo SSH

Makes the package standalone-installable from public GitHub (no git.blax.at
SSH key needed) as part of publishing to the official public package home.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

composer.json

@@ -30,11 +30,11 @@
     "repositories": [
         {
             "type": "vcs",
-            "url": "ssh://git@git.blax.at:222/blax-software/reactphp-kernel.git"
+            "url": "https://github.com/blax-software/reactphp-kernel.git"
         },
         {
             "type": "vcs",
-            "url": "ssh://git@git.blax.at:222/blax-software/laravel-ws.git"
+            "url": "https://github.com/blax-software/laravel-ws.git"
         }
     ],
     "autoload": {