update deploy action

Author: devsnek

.github/workflows/docs.yml

@@ -10,10 +10,10 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
         with:
-          node-version: '14'
+          node-version: '15'
       - run: "npm install"
       - run: "npm run docs"
-      - uses: JamesIves/github-pages-deploy-action@3.5.9
+      - uses: JamesIves/github-pages-deploy-action@3.7.1
         with:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           BRANCH: docs