allow flex plugin to run

Author: dbu

.github/workflows/test-application.yaml

@@ -40,7 +40,9 @@ jobs:
                   tools: 'composer:v2'
 
             - name: Install Symfony Flex
-              run: composer global require --no-progress --no-scripts --no-plugins symfony/flex
+              run: |
+                composer global config --no-plugins allow-plugins.symfony/flex true
+                composer global require --no-progress --no-scripts --no-plugins symfony/flex
 
             - name: Install dependencies with Composer
               uses: ramsey/composer-install@v1