Update the node version in GitHub Actions

Author: TaiSakuma

.github/workflows/unit-test.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: "18.x"
+          node-version: "22.x"
 
       - name: Install dependencies
         run: yarn install