chore: cancel overtaken workflow runs

Author: jxom

.github/workflows/prerelease.yml

@@ -1,6 +1,10 @@
 name: Prerelease
 on: [push, pull_request]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref_type }}-${{ github.head_ref || github.ref_name }}
+  cancel-in-progress: true
+
 jobs:
   build:
     runs-on: ubuntu-latest

.github/workflows/verify.yml

@@ -3,6 +3,10 @@ on:
   workflow_call:
   workflow_dispatch:
 
+concurrency:
+  group: verify-${{ github.ref_type }}-${{ github.head_ref || github.ref_name }}
+  cancel-in-progress: true
+
 jobs:
   checks:
     name: Checks