Bump nodejs 18 -> 20

Summary: This should bring CI green again.

Reviewed By: TD5

Differential Revision: D80709800

fbshipit-source-id: 8c6f336d4e89cb567778987002f80ef8e9ab15f4

Author: robertoaloi

.github/workflows/ci.yml

@@ -143,7 +143,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version: 20
       - name: Install VSCE
         run: npm install -g vsce
       - name: Prepare VS Code Extension to host binaries