[8.16] [DOCS] Add alerting performance enhancements to 8.16 release n…

…otes (#199043) (#199105)

# Backport

This will backport the following commits from `main` to `8.16`:
- [[DOCS] Add alerting performance enhancements to 8.16 release notes
(#199043)](#199043)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Lisa
Cawley","email":"[email protected]"},"sourceCommit":{"committedDate":"2024-11-06T11:23:23Z","message":"[DOCS]
Add alerting performance enhancements to 8.16 release notes
(#199043)\n\n## Summary\r\n\r\nThis PR adds
#188194 to the\r\n8.16.0 Kibana
release notes.\r\nIt also fixes a formatting issue.\r\n\r\n###
Preview\r\n\r\n\r\nhttps://kibana_bk_199043.docs-preview.app.elstc.co/guide/en/kibana/master/release-notes-8.16.0.html","sha":"14a1a92a422fa7fc69902e5a80d071b182dc37aa","branchLabelMapping":{"^v9.0.0$":"main","^v8.17.0$":"8.x","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["Team:Docs","release_note:skip","v9.0.0","docs","v8.16.0","backport:version","v8.17.0"],"title":"[DOCS]
Add alerting performance enhancements to 8.16 release
notes","number":199043,"url":"https://github.com/elastic/kibana/pull/199043","mergeCommit":{"message":"[DOCS]
Add alerting performance enhancements to 8.16 release notes
(#199043)\n\n## Summary\r\n\r\nThis PR adds
#188194 to the\r\n8.16.0 Kibana
release notes.\r\nIt also fixes a formatting issue.\r\n\r\n###
Preview\r\n\r\n\r\nhttps://kibana_bk_199043.docs-preview.app.elstc.co/guide/en/kibana/master/release-notes-8.16.0.html","sha":"14a1a92a422fa7fc69902e5a80d071b182dc37aa"}},"sourceBranch":"main","suggestedTargetBranches":["8.16","8.x"],"targetPullRequestStates":[{"branch":"main","label":"v9.0.0","branchLabelMappingKey":"^v9.0.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/199043","number":199043,"mergeCommit":{"message":"[DOCS]
Add alerting performance enhancements to 8.16 release notes
(#199043)\n\n## Summary\r\n\r\nThis PR adds
#188194 to the\r\n8.16.0 Kibana
release notes.\r\nIt also fixes a formatting issue.\r\n\r\n###
Preview\r\n\r\n\r\nhttps://kibana_bk_199043.docs-preview.app.elstc.co/guide/en/kibana/master/release-notes-8.16.0.html","sha":"14a1a92a422fa7fc69902e5a80d071b182dc37aa"}},{"branch":"8.16","label":"v8.16.0","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"},{"branch":"8.x","label":"v8.17.0","branchLabelMappingKey":"^v8.17.0$","isSourceBranch":false,"state":"NOT_CREATED"}]}]
BACKPORT-->

Co-authored-by: Lisa Cawley <[email protected]>

docs/CHANGELOG.asciidoc

@@ -126,6 +126,7 @@ AGPL license::
 Alerting::
 * Adds TheHive connector ({kibana-pull}180138[#180138]).
 * Adds flapping settings per rule ({kibana-pull}189341[#189341]).
+* Efficiency improvements in the Kibana task manager and alerting frameworks ({kibana-issue}188194[#188194])
 Cases::
 * Support TheHive connector in cases ({kibana-pull}180931[#180931]).
 Dashboards and visualizations::
@@ -138,10 +139,8 @@ Data ingestion and Fleet::
 * Advanced agent monitoring options UI for HTTP endpoint and diagnostics ({kibana-pull}193361[#193361]).
 * Adds option to have Kafka dynamic topics in outputs ({kibana-pull}192720[#192720]).
 * Adds support for GeoIP processor databases in Ingest Pipelines ({kibana-pull}190830[#190830]).
-////
-!!TODO!! The above PR had a lengthy release note description:
-The Ingest Pipelines app now supports adding and managing databases for the GeoIP processor. Additionally, the pipeline creation flow now includes support for the IP Location processor.
-////
+// !!TODO!! The above PR had a lengthy release note description:
+// The Ingest Pipelines app now supports adding and managing databases for the GeoIP processor. Additionally, the pipeline creation flow now includes support for the IP Location processor.
 * Adds agentless ux creation flow ({kibana-pull}189932[#189932]).
 * Enable feature flag for reusable integration policies ({kibana-pull}187153[#187153]).
 Discover::