Re-enable pnpm cache

Author: weirdwater

.github/workflows/TestPWTCommands.yml

@@ -49,6 +49,7 @@ jobs:
         uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version: ${{ matrix.node == 18 && '18.15.0' || matrix.node }}
+          cache: 'pnpm'
 
       - name: "Installing dependencies"
         if: true || steps.filter.outputs.packages == 'true' || steps.filter.outputs.tests == 'true'