ci: simplify concurrency check

Author: dundargoc

.github/workflows/build-and-test.yml .github/workflows/ci.yml.github/workflows/build-and-test.yml renamed to .github/workflows/ci.yml

@@ -1,21 +1,20 @@
+name: ci
+
 on:
   push:
     branches:
       - 'master'
   pull_request:
 
-name: build-and-test
-
 concurrency:
-  group: ${{ github.workflow }}-${{ github.event_name == 'pull_request' && github.head_ref || github.sha }}
-  cancel-in-progress: true
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 
 jobs:
   check:
     name: Build and Check
     runs-on: ubuntu-latest
     timeout-minutes: 10
-
     steps:
       - uses: actions/checkout@v4