Update from hummingbird-project-template b3ba991f3741d80678253d3eae3253cd37a86ef1 (#46)

Co-authored-by: adam-fowler <adam-fowler@users.noreply.github.com>

.github/workflows/api-breakage.yml

@@ -2,6 +2,9 @@ name: API breaking changes
 
 on:
   pull_request:
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-apibreakage
+  cancel-in-progress: true
 
 jobs:
   linux:

.github/workflows/ci.yml

@@ -9,6 +9,9 @@ on:
     - '**.yml'
   pull_request:
   workflow_dispatch:
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-ci
+  cancel-in-progress: true
 
 jobs:
   macOS:

.github/workflows/validate.yml

@@ -2,6 +2,9 @@ name: Validity Check
 
 on:
   pull_request:
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-validate
+  cancel-in-progress: true
 
 jobs:
   validate: