Cancel in-progress workflow runs on a subsequent pull-request pushes

This will cancel any outstanding workflow runs when a commit is pushed
to the active pull request. This is done by configuring `concurrency` in
which only a single job or workflow in a concurrency `group` is active
at a single time.

Signed-off-by: Colton Padden <colton.padden@fastmail.com>

.github/workflows/ci.yml

@@ -4,6 +4,11 @@ on:
   pull_request:
     paths-ignore:
       - 'microsite/**'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   verify:
     runs-on: ubuntu-latest

.github/workflows/verify_e2e-linux.yml

@@ -8,6 +8,10 @@ on:
       - 'docs/**'
       - 'microsite/**'
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
     runs-on: ${{ matrix.os }}

.github/workflows/verify_e2e-techdocs.yml

@@ -8,6 +8,10 @@ on:
       - 'docs/**'
       - 'microsite/**'
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   verify:
     runs-on: ubuntu-latest

.github/workflows/verify_e2e-windows.yml

@@ -10,6 +10,10 @@ on:
       - 'packages/e2e-test/**'
       - 'packages/create-app/**'
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
     runs-on: ${{ matrix.os }}