Add PHP 8.5 to pipeline

Author: mrook

.github/workflows/build.yml

@@ -64,7 +64,7 @@ jobs:
       fail-fast: false
       matrix:
         operating-system: [ ubuntu-latest, macos-latest, windows-latest ]
-        php: [ '8.1', '8.2', '8.3', '8.4' ]
+        php: [ '8.1', '8.2', '8.3', '8.4', '8.5' ]
         dependencies: [ 'lowest', 'locked' ]
         experimental: [ false ]