CI: cancel stale workflows.

Author: bavshin-f5

.github/workflows/ci.yaml

@@ -6,6 +6,10 @@ on:
       - main
   pull_request:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
 env:
   CARGO_TERM_COLOR: 'always'
   RUST_BACKTRACE: '1'

.github/workflows/sanitizers.yaml

@@ -6,6 +6,10 @@ on:
       - main
   pull_request:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.ref != 'refs/heads/main' }}
+
 env:
   CARGO_TERM_COLOR: 'always'
   RUST_BACKTRACE: '1'