Revert ignore cache

Author: Fokko

.github/workflows/python-ci.yml

@@ -54,10 +54,10 @@ jobs:
     - name: Install poetry
       run: make install-poetry
     - uses: actions/setup-python@v5
-#      with:
-#        python-version: ${{ matrix.python }}
-#        cache: poetry
-#        cache-dependency-path: ./poetry.lock
+      with:
+        python-version: ${{ matrix.python }}
+        cache: poetry
+        cache-dependency-path: ./poetry.lock
     - name: Install system dependencies
       run: sudo apt-get update && sudo apt-get install -y libkrb5-dev # for kerberos
     - name: Install