feat: add concurrency options to ci workflow (#2337)

Author: pitoniak32

.github/workflows/ci.yml

@@ -8,6 +8,9 @@ on:
     - main
     paths-ignore:
     - '**.md'
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 jobs:
   test:
     strategy:

.github/workflows/semver.yml

@@ -4,7 +4,6 @@ env:
 on:
   pull_request:
     types: [ labeled, synchronize, opened, reopened ]
-
 jobs:
   semver-compliance: # This job uses the latest published crate as baseline for comparison.
     runs-on: ubuntu-latest