ci: add concurrency group

Author: gjasny

.github/workflows/bazel-ci.yml

@@ -1,6 +1,9 @@
 name: Bazel CI
 on: [pull_request]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
 jobs:
   build:
     name: Bazel on ${{ matrix.os }}

.github/workflows/cmake-ci.yml

@@ -1,6 +1,9 @@
 name: CMake CI
 on: [pull_request]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
 jobs:
   build:
     name: CMake on ${{ matrix.os }} with ${{ matrix.dependencies }}

.github/workflows/coverage.yml

@@ -1,6 +1,9 @@
 name: Coverage
 on: [pull_request]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
 jobs:
   build:
     name: Code Coverage

.github/workflows/doxygen.yml

@@ -4,6 +4,9 @@ on:
     branches:
       - master
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
 jobs:
   build:
     name: Code Coverage

.github/workflows/linting.yml

@@ -1,6 +1,9 @@
 name: Linting
 on: [pull_request]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+
 jobs:
   iwyu:
     name: Include What You Use