Use node-version: '22' in setup-node steps

Signed-off-by: Tamal Saha <tamal@appscode.com>

Author: tamalsaha

.github/workflows/preview-website.yml

@@ -53,7 +53,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
-          node-version: '20'
+          node-version: '22'
 
       - name: Install yq
         run: |