Clean up README header and move nav links under What Can Robusta Do

Remove subtitle and HolmesGPT callout from header. Move navigation
links (How it Works, Installation, etc.) under the What Can Robusta
Do section.

https://claude.ai/code/session_0184fwhrjC4ELrYQBMCbyhfS

Author: claude

README.md

@@ -2,23 +2,20 @@
 
 <div align="center">
   <h1 align="center">Robusta Classic - Prometheus Alert Enrichment for Kubernetes</h1>
-  <h2 align="center">Rule-based grouping, enrichment, and remediation of your existing alerts</h2>
-  <p align="center">
-    <a href="https://github.com/robusta-dev/holmesgpt"><strong>Looking for HolmesGPT (AI-powered investigation)? Go here ↗</strong></a>
-  </p>
-  <p align="center">
-    <a href="#%EF%B8%8F-how-it-works"><strong>How it Works</strong></a> |
-    <a href="#-installing-robusta"><strong>Installation</strong></a> |
-    <a href="https://docs.robusta.dev/master/configuration/index.html"><strong>Integrations ↗</strong></a> |
-    <a href="https://docs.robusta.dev/master/index.html"><strong>Docs ↗</strong></a> |
-    <a href="https://bit.ly/robusta-slack"><strong>Slack Community ↗</strong></a>
-  </p>
 </div>
 
 > **Note:** This repository contains **Robusta Classic** — the rule-based alert enrichment engine. For AI-powered root cause analysis, see [HolmesGPT](https://github.com/robusta-dev/holmesgpt). Both can be installed together as part of the [Robusta platform](https://platform.robusta.dev/signup).
 
 ## What Can Robusta Do?
 
+<p align="center">
+  <a href="#%EF%B8%8F-how-it-works"><strong>How it Works</strong></a> |
+  <a href="#-installing-robusta"><strong>Installation</strong></a> |
+  <a href="https://docs.robusta.dev/master/configuration/index.html"><strong>Integrations ↗</strong></a> |
+  <a href="https://docs.robusta.dev/master/index.html"><strong>Docs ↗</strong></a> |
+  <a href="https://bit.ly/robusta-slack"><strong>Slack Community ↗</strong></a>
+</p>
+
 Compatible with kube-prometheus-stack, Prometheus Operator, and more.
 
 Robusta integrates with Prometheus by webhook and adds features like: