ci: cancel in-progress release runs for the same tag

Prevents duplicate release creation when a tag is force-pushed while a
build is still running.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: arwin

.github/workflows/release.yml

@@ -3,6 +3,10 @@ name: Build and Release
 on:
   push:
     tags:
+
+concurrency:
+  group: release-${{ github.ref_name }}
+  cancel-in-progress: true
       - 'v*'
 
 jobs: