CI: crowdin: fix GITHUB_TOKEN name

The Crowdin action is not working because it fails to find 
the github token.
"GH_TOKEN" was copied from the original crowdin script.
It seems that Github changed it to GITHUB_TOKEN.
Let's see if it works now.

Author: shpaass

.github/workflows/crowdin-translation-action.yml

@@ -26,7 +26,7 @@ jobs:
           skip_untranslated_strings: true
         env:
           # A classic GitHub Personal Access Token with the 'repo' scope selected (the user should have write access to the repository).
-          GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
           # A numeric ID, found at https://crowdin.com/project/<projectName>/tools/api
           CROWDIN_PROJECT_ID: ${{ secrets.CROWDIN_PROJECT_ID }}