Add PHP 8.5 to testing workflow (#15)

Author: olivervogel

.github/workflows/build.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: ['8.2', '8.3', '8.4']
+        php: ['8.2', '8.3', '8.4', '8.5']
     name: Testing on PHP ${{ matrix.php }}
     steps:
       - name: Checkout