ci: set setup-node to v4

Author: Trickfilm400

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
           - x.x.x # safety net; don't remove
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node_version }}
       - run: npm ci