Website: Update text in "Managed cloud for growing deployments" step of start flow (#25743)

Changes:
- Updated the text in the "Managed cloud for growing deployments" step
of the start flow.

Author: eashaw

website/views/pages/start.ejs

@@ -706,7 +706,7 @@
         </div>
         <div class="mx-auto">
           <h2>Managed cloud for growing deployments</h2>
-          <p>Unfortunately, managed cloud hosting is not yet available for growing deployments of less than 700 hosts.</p>
+          <p>Hosting for customers under 300 devices is supported by one of our partners.</p>
         </div>
         <div purpose="start-cards" class="justify-content-start">
           <a purpose="card" class="h-auto" :href="`https://calendly.com/fleetdm/chat?email=${encodeURIComponent(me.emailAddress)}&name=${encodeURIComponent(me.firstName+' '+me.lastName)}`">