chore(ci): fix action syntax

Author: gszr

.github/workflows/release.yml

@@ -6,9 +6,9 @@ on:
       - 'v[0-9]+.[0-9]+.[0-9]+'
 
   # cancel previous runs if new commits are pushed to the PR, but run for each commit on master
-  concurrency:
-    group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-    cancel-in-progress: true
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
 
 jobs:
   release: