Updates the Serverless changelog (#1059)

Resolves #1053 by adding
missing serverless release notes and formatting them for Markdown. Also
an addendum to elastic/stack-docs#3017.

Author: jmikell821

release-notes/elastic-cloud-serverless/deprecations.md

@@ -10,16 +10,16 @@ Review the deprecated functionality for {{serverless-full}}. While deprecations
 % For more information, check [PR #](PR link).
 
 ## February 3, 2025 [elastic-cloud-serverless-02032025-deprecations]
-* Rename plugin to automatic import. For more information, check [#207325]({{kib-pull}}207325).
+* Renames the `integration-assistant` plugin to `automatic-import`. For more information, check [#207325]({{kib-pull}}207325).
 
 ## January 27, 2025 [elastic-cloud-serverless-01272025-deprecations]
 * Deprecates a subset of Elastic Security Serverless endpoint management APIs. For more information, check [#206903]({{kib-pull}}206903).
 
 ## January 13, 2025 [elastic-cloud-serverless-01132025-deprecations]
-* Remove all legacy risk engine code and features. For more information, check [#201810]({{kib-pull}}201810).
+* Removes all legacy risk engine code and features. For more information, check [#201810]({{kib-pull}}201810).
 
 ## January 6, 2025 [elastic-cloud-serverless-01062025-deprecations]
-* Disables Elastic Observability Serverless log stream and settings pages. For more information, check [#203996]({{kib-pull}}203996). 
+* Disables the Elastic Observability Serverless log stream and settings pages. For more information, check [#203996]({{kib-pull}}203996). 
 * Removes Logs Explorer in Elastic Observability Serverless. For more information, check [#203685]({{kib-pull}}203685).
 
 ## December 16, 2024 [elastic-cloud-serverless-12162024-deprecations]