Add concurrency setting

Author: graduta

.github/workflows/bookkeeping.yml

@@ -10,6 +10,10 @@ on:
     branches:
       - main
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   parallel_tests:
     name: ${{ matrix.test_type }}

.github/workflows/docker.yml

@@ -9,6 +9,10 @@ on:
 permissions:
   contents: read
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   linter:
     runs-on: ubuntu-latest