Update workflow to require specified symfony version in matrix

Author: silverbackdan

.github/workflows/ci.yml

@@ -89,7 +89,9 @@ jobs:
         if: matrix.coverage
         run: echo "COVERAGE=1" >> $GITHUB_ENV
       - name: Update project dependencies
-        run: composer update --no-progress --ansi
+        run: |
+          composer config extra.symfony.require ${{ matrix.symfony }}
+          composer update --no-progress --ansi
       - name: Install PHPUnit
         run: vendor/bin/simple-phpunit --version
       - name: Clear test app cache
@@ -182,7 +184,9 @@ jobs:
             composer-php${{ matrix.php }}-
         continue-on-error: true
       - name: Update project dependencies
-        run: composer update --no-progress --ansi
+        run: |
+          composer config extra.symfony.require ${{ matrix.symfony }}
+          composer update --no-progress --ansi
       - name: Clear test app cache
         run: tests/Functional/app/bin/console cache:clear --ansi
       - name: Enable code coverage