ci: add gettext dependency to the Composer installer step in codecov workflow

Author: SlimDeluxe

.github/workflows/codecov.yml

@@ -29,6 +29,8 @@ jobs:
 
       - name: Install composer and dependencies
         uses: php-actions/composer@v6
+        with:
+          php_extensions: gettext
 
       - name: PHPUnit Tests
         uses: php-actions/phpunit@v3