Combines features and enhancements (#252)

Combines 6-Jan features and enhancements sections to match previous serverless changelog entries.

Author: KOTungseth

serverless/pages/serverless-changelog.asciidoc

@@ -14,15 +14,10 @@ For serverless changes in Cloud Console, refer to https://www.elastic.co/guide/e
 * Disables Elastic Observability Serverless log stream and settings pages ({kibana-pull}203996[#203996]). 
 * Removes Logs Explorer in Elastic Observability Serverless ({kibana-pull}203685[#203685]). 
 
-
 [discrete]
-[[features-01062025]]
-==== New features
+[[features-enhancements-01062025]]
+=== Features and enhancements
 * Introduces case observables in Elastic Security Serverless ({kibana-pull}190237[#190237]).
-
-[discrete]
-[[enhancements-01062025]]
-==== Enhancements
 * Adds a JSON field called "additional fields" to ServiceNow cases when sent using connector, containing the internal names of the ServiceNow table columns ({kibana-pull}201948[#201948]).
 * Adds the ability to configure the appearance color mode to sync dark mode with the system value ({kibana-pull}203406[#203406]).
 * Makes the "Copy" action visible on cell hover in Discover ({kibana-pull}204744[#204744]).
@@ -171,4 +166,4 @@ For serverless changes in Cloud Console, refer to https://www.elastic.co/guide/e
 * Initializes saved objects when the **Trained Model** page loads ({kibana-pull}201426[#201426]).
 * Fixes the display of deployment stats for unallocated deployments of {ml} models ({kibana-pull}202005[#202005]).
 * Enables the solution type search for instant deployments ({kibana-pull}201688[#201688]).
-* Improves the consistency of alert counts across different views ({kibana-pull}202188[#202188]).
+* Improves the consistency of alert counts across different views ({kibana-pull}202188[#202188]).