docs: update title for Two-Stage Deployment Playbook to reflect current best practices

Author: huan

jekyll/_posts/2025-10-13-two-stage-deployment-playbook.md

@@ -1,5 +1,5 @@
 ---
-title: "📚 PreAngel Two-Stage Deployment Playbook — Firebase App Hosting × Google Cloud Run (v4)"
+title: "Vibe Coding to Production: The Case for a Two-Stage Pipeline"
 excerpt: "Purpose: Present PreAngel’s current best-practice two-stage deployment model — powered by GitHub Actions, Cloud Run, Artifact Registry, and Workload Identity Federation (WIF). This version reflects our final, production-proven approach: direct access, fully declarative, and keyless."
 categories: guide
 author: huan