use pnpm to install dependencies in build workflow

Author: cpea2506

.github/workflows/build.yaml

@@ -12,12 +12,30 @@ jobs:
         uses: actions/checkout@v3
       - name: Install Node.js
         uses: actions/setup-node@v3
+      - name: Install pnpm
+        uses: pnpm/action-setup@v2
+        id: pnpm-install
+        with:
+          version: 6
+          run_install: false
+      - name: Get pnpm store directory
+        id: pnpm-cache
+        shell: bash
+        run: |
+          echo "STORE_PATH=$(pnpm store path)" >> $GITHUB_OUTPUT
+      - uses: actions/cache@v3
+        name: Setup pnpm cache
+        with:
+          path: ${{ steps.pnpm-cache.outputs.STORE_PATH }}
+          key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-pnpm-store-
       - name: Install dependencies
-        run: npm ci
+        run: pnpm install
       - name: Build extension
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: npm run build
+        run: pnpm build
       - name: Xcode build
         uses: sersoft-gmbh/xcodebuild-action@v2
         with: