ci: add concurrency and cancel previous builds

Author: tboerger

.github/workflows/docker.yml

@@ -2,6 +2,10 @@
 # yaml-language-server: $schema=https://www.schemastore.org/github-workflow.json
 name: latest
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 "on":
   workflow_dispatch:
   push:

.github/workflows/v3.10.yml

@@ -2,6 +2,10 @@
 # yaml-language-server: $schema=https://www.schemastore.org/github-workflow.json
 name: v3.10
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 "on":
   workflow_dispatch:
   push:

.github/workflows/v3.11.yml

@@ -2,6 +2,10 @@
 # yaml-language-server: $schema=https://www.schemastore.org/github-workflow.json
 name: v3.11
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 "on":
   workflow_dispatch:
   push:

.github/workflows/v3.12.yml

@@ -2,6 +2,10 @@
 # yaml-language-server: $schema=https://www.schemastore.org/github-workflow.json
 name: v3.12
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 "on":
   workflow_dispatch:
   push:

.github/workflows/v3.9.yml

@@ -2,6 +2,10 @@
 # yaml-language-server: $schema=https://www.schemastore.org/github-workflow.json
 name: v3.9
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 "on":
   workflow_dispatch:
   push: