workflow: manage playground dependency installation separately

Author: haoqunjiang

Diff for: .github/workflows/ci.yml

@@ -39,8 +39,9 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
           cache: 'pnpm'
-      - run: pnpm install --no-frozen-lockfile
+      - run: pnpm install
       - run: pnpm pretest
-      # Rerun install to ensure the dependencies in the playground apps are resolved correctly
-      - run: pnpm install --no-frozen-lockfile
+      - name: Install Playground Dependencies
+        working-directory: ./playground
+        run: pnpm install --no-frozen-lockfile
       - run: pnpm test