ci: add php 8.4

Author: alexkart

.github/workflows/php.yml

@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        php-version: [ '7.3', '7.4', '8.0', '8.1', '8.2', '8.3' ]
+        php-version: [ '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4' ]
 
     steps:
       - uses: actions/checkout@v3