fix: back to npm for vsix CI

Author: juleswritescode

.github/workflows/release_and_publish_vsix.yml

@@ -15,20 +15,17 @@ jobs:
         with:
           node-version-file: package.json
 
-      - name: Install pnpm
-        uses: pnpm/action-setup@v4
-
       - name: Get version from package.json
         id: get_version
         run: |
           VERSION=$(jq -r .version package.json)
           echo "version=$VERSION" >> $GITHUB_OUTPUT
 
       - name: Install dependencies
-        run: pnpm install
+        run: npm ci
 
       - name: Build VSIX package
-        run: pnpm run package
+        run: npm run package
 
       - name: Rename extension file
         run: "mv extension.vsix postgres-language-server-${{ steps.get_version.outputs.version }}.vsix"