Replace ☢️ with :danger: in Buildkite pipeline

---

Generated with the help of Claude Code, https://code.claude.com

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: mokagio

.buildkite/pipeline.yml

@@ -26,7 +26,7 @@ steps:
       - github_commit_status:
           context: "Static code analysis"
 
-  - label: "☢️ Danger - PR Check"
+  - label: ":danger: Danger - PR Check"
     command: danger
     key: danger
     if: "build.pull_request.id != null"