Run CI with latest stable PHP version (#1022)

Author: jderusse

.github/workflows/branch_alias.yml

@@ -13,7 +13,7 @@ jobs:
       - name: Set up PHP
         uses: shivammathur/setup-php@2.7.0
         with:
-          php-version: 7.4
+          php-version: 8.0
           coverage: none
 
       - name: Find branch alias