Update tests.yml

Author: GrahamCampbell

.github/workflows/tests.yml

@@ -70,7 +70,7 @@ jobs:
         with:
           timeout_minutes: 5
           max_attempts: 5
-          command: composer require "symfony/console:^6.4" --no-update --no-interaction
+          command: composer require "symfony/console:^6.0" --no-update --no-interaction
         if: "matrix.symfony == '6'"
 
       - name: Select Symfony 7