PHP 8.5 test build

Author: dries-c

.github/workflows/main.yml

@@ -20,6 +20,9 @@ jobs:
           - pm-version-major: 5
             php-version-base: "8.4"
             special-release: default-latest #default = best for PM5, latest = display as latest on GitHub
+          - pm-version-major: 5
+            php-version-base: "8.5"
+            pm-preview: true
 
     uses: ./.github/workflows/main-pm-matrix.yml
     with: