ci: auto cancel previous jobs when new commit pushed for github workflow

Signed-off-by: Huaqi Fang <[email protected]>

Author: fanghuaqi

.github/workflows/doc.yaml

@@ -2,6 +2,10 @@
 
 name: Documentation
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 # Controls when the action will run. Triggers the workflow on push or pull request
 # events but only for the master branch
 on: