Fix up silly mistakes

.github/actions/setup/action.yml

@@ -34,7 +34,7 @@ runs:
       uses: actions/cache@v3
       with:
         path: ~/.local  # the path depends on the OS
-        key: "${{ inputs.os }}-poetry-4"  # increment to reset cache
+        key: "${{ inputs.os }}-poetry-5"  # increment to reset cache
     - name: Install Poetry
       if: steps.cached-poetry.outputs.cache-hit != 'true'
       uses: snok/install-poetry@v1

.github/workflows/ci.yaml

@@ -111,7 +111,6 @@ jobs:
           poetry-dependency-install-flags: "--only main"
       - name: Check importable without extras
         run: |
-          source $VENV  # ensure windows will find poetry
           poetry run python scripts/test-install.py
 
   check-build: