Use npm i instead of npm ci in Cloud Foundry deployment (#48)

Need to do this if we decide to `.gitignore` the `package-lock.json` for this sample.

Author: swaldmann

.github/workflows/cf.yaml

@@ -40,7 +40,7 @@ jobs:
           cf-space: ${{ vars.CF_SPACE }}
           cf-username: ${{ vars.CF_USERNAME }}
           cf-password: ${{ secrets.CF_PASSWORD }}
-      - run: npm clean-install
+      - run: npm install
       - run: npx cds up
 
       - run: cf logs ${{ env.APP_NAME }} --recent