Update Node.js version to 20 in the deployment workflow

Author: robertpiosik

.github/workflows/deploy-vscode-extension.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '18'
+          node-version: '20'
           registry-url: 'https://registry.npmjs.org'
 
       - name: Setup PNPM