fixes concurrency group (#2409)

Signed-off-by: Wenqi Li <[email protected]>

Author: wyli

.github/workflows/blossom-ci.yml

@@ -14,7 +14,7 @@ on:
 
 concurrency:
   # automatically cancel the previously triggered workflows when there's a newer version
-  group: build-${{ github.event.pull_request.number || github.ref }}
+  group: blossom-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true
 
 jobs: