ci: downgrade setup node to v4

Author: CharlieC3

.github/workflows/ci.yml

@@ -134,7 +134,7 @@ jobs:
         env:
           GH_TOKEN: ${{ steps.generate_token.outputs.token }}
 
-      - uses: actions/setup-node@v6
+      - uses: actions/setup-node@v4
         with:
           node-version-file: '.nvmrc'
           registry-url: 'https://registry.npmjs.org'