fix h levels

Author: shainaraskas

serverless/pages/what-is-serverless.mdx

@@ -27,7 +27,7 @@ The size of the cache layer and the volume of data it holds depend on <DocLink i
   Until May 31, 2024, your serverless consumption will not incur any charges, but will be visible along with your total Elastic Cloud consumption on the [Billing Usage page](https://cloud.elastic.co/billing/usage?). Unless you are in a trial period, usage on or after June 1, 2024 will be deducted from your existing Elastic Cloud credits or be billed to your active payment method.
 </DocCallOut>
 
-# Control your data and performance 
+## Control your data and performance 
 
 Control your project data and query performance against your project data.  
 
@@ -38,7 +38,7 @@ and you define the retention settings for your data streams.
 
 <DocCallOut title="Some or all of these settings may not be available for all types of serverless projects." />
 
-# Differences between serverless projects and hosted deployments on ((ecloud))
+## Differences between serverless projects and hosted deployments on ((ecloud))
 
 You can run [hosted deployments](https://www.elastic.co/guide/en/cloud/current/ec-getting-started.html) of the ((stack)) on ((ecloud)). These hosted deployments provide more provisioning and advanced configuration options.
 
@@ -55,7 +55,7 @@ You can run [hosted deployments](https://www.elastic.co/guide/en/cloud/current/e
 | **Backups**            | Projects automatically backed up by Elastic.              | Your responsibility with Snapshot & Restore.                                      |
 | **Data retention**     |      Editable on data streams.                                                     | Index Lifecycle Management.                                                       |
 
-# Answers to common serverless questions
+## Answers to common serverless questions
 
 **What Support is available for the serverless preview?**