ci: set concurrency group for workflows

It is now to costly to run the full CI, so we need
to limit the number of concurrent runs to avoid
blocking the queue.

Author: haoqunjiang

Diff for: .github/workflows/ci.yml

@@ -10,6 +10,9 @@ on:
   pull_request:
     branches:
       - '**'
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 jobs:
   build:
     runs-on: ubuntu-latest

Diff for: .github/workflows/publish.yml

@@ -5,6 +5,9 @@ on:
     tags:
       - 'v*' # Push events to matching v*, i.e. v1.0, v20.15.10
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+
 jobs:
   release:
     # Use Publish environment for deployment protection