refactor: replace cancel-workflow-action with native concurrency

Use GitHub's built-in concurrency control instead of third-party action.
This eliminates the need for actions: write permission and simplifies
the action implementation.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: vaind

.github/workflows/workflow-tests.yml

@@ -7,7 +7,6 @@ on:
 permissions:
   contents: write
   pull-requests: write
-  actions: write
 
 jobs:
   # Test PR creation scenario - should create a PR with specific version pattern

updater/README.md

@@ -15,6 +15,11 @@ on:
     branches:
       - main
 
+# Cancel previous runs when new ones are triggered
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   # Update a git submodule
   cocoa:

updater/action.yml

@@ -54,11 +54,6 @@ runs:
       with:
         token: ${{ inputs.api-token }}
 
-    - name: Cancel Previous Runs
-      uses: styfle/cancel-workflow-action@85880fa0301c86cca9da44039ee3bb12d3bedbfa # Tag: 0.12.1
-      with:
-        access_token: ${{ github.token }}
-
     - name: Validate dependency name
       shell: pwsh
       run: |