Update homepage hero: kicker text and heading copy (#44398)

## Summary
- Updated the hero kicker text from "High-agency device management" to
"Open MDM + patching + vuln management for every OS"
- Changed the hero heading from "Configure, update, and secure all your
devices like it's 2026" to "Manage, update, and secure all your devices
like it's 2026"

## Changes
- `website/views/pages/homepage.ejs` — Updated hero kicker (`<h4>`) and
heading (`<h1>`) copy only. No CSS, image, or badge changes.

---

Built for [Mike
McNeil](https://fleetdm.slack.com/archives/D0AFASLRHNU/p1777480833207639?thread_ts=1777387080.444799&cid=D0AFASLRHNU)
by [Kilo for Slack](https://kilo.ai/slack)

---------

Co-authored-by: kiloconnect[bot] <240665456+kiloconnect[bot]@users.noreply.github.com>
Co-authored-by: Mike McNeil <mikermcneil@users.noreply.github.com>

website/views/pages/homepage.ejs

@@ -11,9 +11,9 @@
         <div class="d-flex flex-row justify-content-start justify-content-sm-center justify-content-md-start align-items-start">
           <%/* Hero text */%>
           <div purpose="hero-text" class="d-flex flex-column justify-content-start">
-            <h4>High-agency device management</h4>
+            <h4>Open MDM + patching + vuln management for every OS.</h4>
             <h1>
-              Configure, update, and secure all your devices like it's 2026
+              Manage, update, and secure all your devices like it's 2026
             </h1>
             <div purpose="hero-quote-author" class="d-flex flex-row align-items-center">
               <div purpose="hero-quote-profile-image">