ci: node 20

Author: moshfeu

.github/workflows/deploy.yml

@@ -10,7 +10,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
       - run: yarn
       - run: yarn package
       - name: Publish to Open VSX Registry