Merge pull request RustPython#3833 from GoGim1/ci

Support cancel previous CI workflow

Author: youknowone

.github/workflows/ci.yaml

@@ -5,6 +5,13 @@ on:
 
 name: CI
 
+# Cancel previous workflows if they are the same workflow on same ref (branch/tags)
+# with the same event (push/pull_request) even they are in progress.
+# This setting will help reduce the number of duplicated workflows.
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name }}
+  cancel-in-progress: true
+
 env:
   CARGO_ARGS: --features ssl,jit
   NON_WASM_PACKAGES: >