fix: remove label name from CI concurrency group (#2044)

Signed-off-by: Terry Kong <terryk@nvidia.com>

Author: terrykong

.github/workflows/cicd-main.yml

@@ -46,7 +46,7 @@ on:
   #    - 'main'
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}-${{ github.event.label.name || 'main' }}
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true
 
 jobs: