Update docker-image.yml

Added PHP8.4

Author: Ym0T

.github/workflows/docker-image.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-version: [ '8.0', '8.1', '8.2', '8.3' ] # PHP versions to build
+        php-version: [ '8.0', '8.1', '8.2', '8.3', '8.4' ] # PHP versions to build
 
     permissions:
       contents: read