Website: update "Managed cloud for growing deployments" step of start questionnaire (#23163)

Closes: https://github.com/fleetdm/confidential/issues/7956

Changes:
- Updated the link presented to users on the "Managed cloud for growing
deployments" step of the get started questionnaire

website/assets/styles/pages/start.less

@@ -230,7 +230,7 @@
     margin-bottom: 40px;
   }
   [purpose='card'] {
-    width: 252px;
+    width: 256px;
     height: 200px;
     display: flex;
     flex-direction: column;
@@ -238,7 +238,7 @@
     align-items: center;
     text-decoration: none;
     cursor: pointer;
-    padding: 24px;
+    padding: 32px;
     background: #FFF;
     color: @core-fleet-black-75;
     border-radius: 12px;

website/views/pages/start.ejs

@@ -703,10 +703,9 @@
           <p>Unfortunately, managed cloud hosting is not yet available for growing deployments of less than 700 hosts.</p>
         </div>
         <div purpose="start-cards" class="justify-content-start">
-          <a purpose="card" href="/docs/deploy">
-            <img alt="Premium support" src="/images/icon-deploy-fleet-64x64@2x.png">
-            <h2>Deploy Fleet</h2>
-            <p>Learn how to deploy Fleet</p>
+          <a purpose="card" class="h-auto" :href="`https://calendly.com/fleetdm/talk-to-us?email=${encodeURIComponent(me.emailAddress)}&name=${encodeURIComponent(me.firstName+' '+me.lastName)}`">
+            <img alt="Premium support" src="/images/icon-premium-support-64x64@2x.png">
+            <h2>Get in touch</h2>
           </a>
         </div>
         <div purpose="form-buttons">