532: use newer PHP for static analysis

Author: asgrim

.github/workflows/continuous-integration.yml

@@ -192,7 +192,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: 8.1
+          php-version: 8.5
           extensions: intl, sodium, zip
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}