Add php 8.4 to workflow matrix

Author: tomchkk

.github/workflows/tests.yaml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: ['8.2', '8.3']
+        php: ['8.2', '8.3', '8.4']
         laravel: ['^10.0', '^11.0', '^12.0']
 
     steps: