ci: concurrency control on v13 branches

.github/workflows/patch.yml

@@ -8,6 +8,10 @@ on:
   workflow_dispatch:
 
 
+concurrency:
+  group: patch-mariadb-v13-${{ github.event.number }}
+  cancel-in-progress: true
+
 jobs:
   test:
     runs-on: ubuntu-18.04

.github/workflows/server-tests.yml

@@ -12,6 +12,10 @@ on:
       - '**.js'
       - '**.md'
 
+concurrency:
+  group: server-mariadb-v13-${{ github.event.number }}
+  cancel-in-progress: true
+
 jobs:
   test:
     runs-on: ubuntu-18.04

.github/workflows/ui-tests.yml

@@ -6,6 +6,10 @@ on:
       - '**.md'
   workflow_dispatch:
 
+concurrency:
+  group: ui-v13-${{ github.event.number }}
+  cancel-in-progress: true
+
 jobs:
   test:
     runs-on: ubuntu-18.04