Removed php 8.4 from github workflow (for now)

Author: MaximilianKresse

.github/workflows/tests.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: ['8.2', '8.3', '8.4']
+        php: ['8.2', '8.3']
     steps:
       - name: Checkout
         uses: actions/checkout@v2