Update PHP version in CI workflow to include 8.4

Author: francoism90

.github/workflows/run-tests.yml

@@ -17,7 +17,7 @@ jobs:
       fail-fast: true
       matrix:
         os: [ubuntu-latest]
-        php: [8.3, 8.2]
+        php: [8.4, 8.3]
         stability: [prefer-lowest, prefer-stable]
         include:
           - laravel: 11.*