Update build.yml

Author: Yozhef

.github/workflows/build.yml

@@ -22,6 +22,9 @@ jobs:
                 symfony-version:
                     - '6.2.*'
                     - '7.0.*'
+                exclude:
+                    - php-version: '8.1'
+                      symfony-version: '7.0.*'
         steps:
             - name: Checkout
               uses: actions/checkout@v3