Fix extension publish action (#3860)

Author: cte

.github/workflows/marketplace-publish.yml

@@ -7,6 +7,7 @@ on:
 env:
   GIT_REF: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || 'main' }}
   NODE_VERSION: 20.18.1
+  PNPM_VERSION: 10.8.1
 
 jobs:
   publish-extension:
@@ -19,17 +20,25 @@ jobs:
         contains(github.event.pull_request.title, 'Changeset version bump') ) ||
         github.event_name == 'workflow_dispatch'
     steps:
+      - name: Checkout code
       - uses: actions/checkout@v4
         with:
           ref: ${{ env.GIT_REF }}
-      - uses: actions/setup-node@v4
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: ${{ env.PNPM_VERSION }}
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ env.NODE_VERSION }}
-      - run: |
+          cache: 'pnpm'
+      - name: Install dependencies
+        run: pnpm install
+      - name: Configure Git
+        run: |
           git config user.name "github-actions[bot]"
           git config user.email "github-actions[bot]@users.noreply.github.com"
-      - name: Install Dependencies
-        run: pnpm install
       - name: Create .env file
         run: echo "POSTHOG_API_KEY=${{ secrets.POSTHOG_API_KEY }}" >> .env
       - name: Package Extension