Add tested support for PHP 8.5

Author: olivervogel

.github/workflows/run-tests.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [ '8.1', '8.2', '8.3', '8.4' ]
+        php: [ '8.1', '8.2', '8.3', '8.4', '8.5' ]
         imagemagick: [ '6.9.13-25', '7.1.1-47' ]
 
     name: PHP ${{ matrix.php }} - ImageMagick ${{ matrix.imagemagick }}