docs: update for v3

Author: peaceiris

README.md

@@ -567,45 +567,44 @@ name: github pages
 on:
   push:
     branches:
-    - master
+      - master
 
 jobs:
-  build-deploy:
+  deploy:
     runs-on: ubuntu-18.04
     steps:
-    - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
 
-    - name: Setup Node
-      uses: actions/setup-node@v1
-      with:
-        node-version: '10.x'
+      - name: Setup Node
+        uses: actions/setup-node@v1
+        with:
+          node-version: '10.x'
 
-    - name: Get yarn cache
-      id: yarn-cache
-      run: echo "::set-output name=dir::$(yarn cache dir)"
+      - name: Get yarn cache
+        id: yarn-cache
+        run: echo "::set-output name=dir::$(yarn cache dir)"
 
-    - name: Cache dependencies
-      uses: actions/cache@v1
-      with:
-        path: ${{ steps.yarn-cache.outputs.dir }}
-        key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-yarn-
+      - name: Cache dependencies
+        uses: actions/cache@v1
+        with:
+          path: ${{ steps.yarn-cache.outputs.dir }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
 
-    - run: yarn install
+      - run: yarn install
 
-    - run: yarn build
+      - run: yarn build
 
-    - run: yarn export
+      - run: yarn export
 
-    - run: touch ./out/.nojekyll
+      - run: touch ./out/.nojekyll
 
-    - name: deploy
-      uses: peaceiris/actions-gh-pages@v2
-      env:
-        ACTIONS_DEPLOY_KEY: ${{ secrets.ACTIONS_DEPLOY_KEY }}
-        PUBLISH_BRANCH: gh-pages
-        PUBLISH_DIR: ./out
+      - name: Deploy
+        uses: peaceiris/actions-gh-pages@v3
+        env:
+          deploy_key: ${{ secrets.ACTIONS_DEPLOY_KEY }}
+          publish_dir: ./out
 ```
 
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