Downgrade Python setup action to version 5

Author: DaanHoogland

.github/workflows/ci.yml

@@ -228,7 +228,7 @@ jobs:
           cache: 'maven'
 
       - name: Set up Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v5
         with:
           python-version: '3.12'
           architecture: 'x64'