[Enhance] Cancel previous runs that are not completed (#1102)

.github/workflows/build.yml

@@ -22,6 +22,10 @@ on:
       - 'docs/**'
       - 'docs_zh-CN/**'
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   lint:
     runs-on: ubuntu-18.04

.github/workflows/deploy.yml

@@ -2,6 +2,10 @@ name: deploy
 
 on: push
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build-n-publish:
     runs-on: ubuntu-18.04