ci: bump php to 8.5

Author: rustatian

.github/workflows/linux.yml

@@ -17,7 +17,7 @@ jobs:
     timeout-minutes: 60
     strategy:
       matrix:
-        php: [ "8.4" ]
+        php: [ "8.5" ]
         go: [ "stable" ]
         os: [ "ubuntu-latest" ]
     steps: