Add PHP 8.5 to CI test matrix

Signed-off-by: Simon Podlipsky <simon@podlipsky.net>

Author: simPod

.github/workflows/tests.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php: [ 8.1, 8.2, 8.3, 8.4 ]
+        php: [ 8.1, 8.2, 8.3, 8.4, 8.5 ]
         redis-version: [ 5, 6, 7, 8 ]
 
     name: P${{ matrix.php }} - Redis ${{ matrix.redis-version }}