Blat venv cache.

.github/workflows/python-poetry-app.yml

@@ -28,7 +28,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: ~/.local # the path depends on the OS
-          key: poetry-${{ runner.os }}-${{ steps.setup-python.outputs.python-version }}-2 # increment to reset cache, e.g. if you see .venv/bin/activate: No such file or directory
+          key: poetry-${{ runner.os }}-${{ steps.setup-python.outputs.python-version }}-3 # increment to reset cache, e.g. if you see .venv/bin/activate: No such file or directory
 
       - name: Install and configure Poetry, if cache miss
         if: steps.cached-poetry.outputs.cache-hit != 'true'