Update GitHub Actions workflow to target gui-preview branch and upgrade Node.js version to 22

Author: StoppedwummSites

.github/workflows/test.yml

@@ -1,17 +1,17 @@
 name: Test with ViTest
 on:
   push:
-    branches: [main]
+    branches: [gui-preview]
   pull_request:
-    branches: [main]
+    branches: [gui-preview]
 jobs:
   test:
     runs-on: windows-latest
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: "16"
+          node-version: "22"
           cache: "npm"
       - run: npm ci
       - run: npx vitest --run --coverage