add npm install for docs

Signed-off-by: Karthik Ganeshram <[email protected]>

Author: karthik2804

.github/workflows/release.yaml

@@ -84,7 +84,9 @@ jobs:
         - name: Install Node.js
           uses: actions/setup-node@v3
           with:
-            node-version: ${{ env.NODE_VERSION }}
+            node-version: ${{ env.NODE_VERSION }}   
+        - name: Install npm dependencies
+          run: npm install
         - name: Generate Spin JS SDK Docs 
           run: npm run docs
         - name: Upload Spin JS SDK Docs as Artifact