chore: update checkout action to v6 and clarify API token documentation

Author: sunnylqm

.github/workflows/gh-pages.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version: 24

site/pages/docs/api-token.mdx

@@ -76,12 +76,10 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Setup Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: '18'
+        uses: actions/setup-node@v6
 
       - name: Install dependencies
         run: npm install && npm i -g react-native-update-cli