ci: updated reference for concurrency

Author: c-julin

.github/workflows/backend-lint-test.yml

@@ -8,7 +8,7 @@ on:
       - '.github/workflows/backend-lint-test.yml'
   workflow_call:
 concurrency:
-  group: backend-verify-${{ github.head_ref || github.ref }}
+  group: backend-verify-${{ github.head_ref || github.ref_name }}
   cancel-in-progress: true
 permissions:
   contents: read

.github/workflows/frontend-verify.yml

@@ -7,7 +7,7 @@ on:
       - ".github/workflows/frontend-verify.yml"
   workflow_call:
 concurrency:
-  group: frontend-verify-${{ github.head_ref || github.ref }}
+  group: frontend-verify-${{ github.head_ref || github.ref_name }}
   cancel-in-progress: true
 env:
   CI: true