[DOCS] Adds the 8.6.1 release notes (#149421)

## Summary

Adds the release notes for the 8.6.1 release.

Co-authored-by: DeDe Morton <[email protected]>

docs/CHANGELOG.asciidoc

@@ -8,8 +8,9 @@
 :issue: https://github.com/elastic/kibana/issues/
 :pull: https://github.com/elastic/kibana/pull/
 
-Review important information about the {kib} 8.6.0 release.
+Review important information about the {kib} 8.6.x releases.
 
+* <<release-notes-8.6.1>>
 * <<release-notes-8.6.0>>
 //* <<release-notes-8.5.2>>
 //* <<release-notes-8.5.1>>
@@ -40,6 +41,78 @@ Review important information about the {kib} 8.6.0 release.
 
 --
 
+[[release-notes-8.6.1]]
+== {kib} 8.6.1
+
+coming::[8.6.1]
+
+Review the following information about the {kib} 8.6.1 release.
+
+[float]
+[[breaking-changes-8.6.1]]
+=== Breaking changes
+
+Breaking changes can prevent your application from optimal operation and performance.
+Before you upgrade, review the breaking change, then mitigate the impact to your application.
+
+There are no breaking changes in {kib} 8.6.1.
+
+{kibana-ref-all}/8.5/release-notes-8.5.0.html#breaking-changes-8.5.0[8.5.0] | {kibana-ref-all}/8.4/release-notes-8.4.0.html#breaking-changes-8.4.0[8.4.0] | {kibana-ref-all}/8.3/release-notes-8.3.0.html#breaking-changes-8.3.0[8.3.0] | {kibana-ref-all}/8.2/release-notes-8.2.0.html#breaking-changes-8.2.0[8.2.0] | {kibana-ref-all}/8.1/release-notes-8.1.0.html#breaking-changes-8.1.0[8.1.0] | {kibana-ref-all}/8.0/release-notes-8.0.0.html#breaking-changes-8.0.0[8.0.0] | {kibana-ref-all}/8.0/release-notes-8.0.0-rc2.html#breaking-changes-8.0.0-rc2[8.0.0-rc2] | {kibana-ref-all}/8.0/release-notes-8.0.0-rc1.html#breaking-changes-8.0.0-rc1[8.0.0-rc1] | {kibana-ref-all}/8.0/release-notes-8.0.0-beta1.html#breaking-changes-8.0.0-beta1[8.0.0-beta1] | {kibana-ref-all}/8.0/release-notes-8.0.0-alpha2.html#breaking-changes-8.0.0-alpha2[8.0.0-alpha2] | {kibana-ref-all}/8.0/release-notes-8.0.0-alpha1.html#breaking-changes-8.0.0-alpha1[8.0.0-alpha1]
+
+[float]
+[[enhancement-v8.6.1]]
+=== Enhancements
+Alerting::
+* Create OAS for get rule types and get alerting framework health {kibana-pull}148774[#148774]
+* Create open API specification for create/update connector {kibana-pull}148691[#148691]
+* Create open API specification for disable/enable rule and mute/unmute all alerts {kibana-pull}148494[#148494]
+
+Elastic Security::
+For the Elastic Security 8.6.1 release information, refer to {security-guide}/release-notes.html[_Elastic Security Solution Release Notes_].
+
+[float]
+[[fixes-v8.6.1]]
+=== Bug fixes
+Canvas::
+Replaces React.lazy and withSuspense with async imports in expressions plugins {kibana-pull}147693[#147693]
+
+Dashboard::
+* Adds styling to allow clickable *TSVB* markdown images {kibana-pull}147802[#147802]
+* Changes the visibility of the panel filters action {kibana-pull}146335[#146335]
+
+Discover::
+* Adds support for case-insensitive search in Document Viewer {kibana-pull}148312[#148312]
+* Fixes the field stats for the epoch time format {kibana-pull}148288[#148288]
+
+Elastic Security::
+For the Elastic Security 8.6.1 release information, refer to {security-guide}/release-notes.html[_Elastic Security Solution Release Notes_].
+
+Fleet::
+* Fixes missing policy Id in installation URL for cloud integrations {kibana-pull}149243[#149243]
+* Fixes package installation APIs to install packages without a version {kibana-pull}149193[#149193]
+* Fixes issue where the latest GA version could not be installed if there was a newer prerelease version in the registry {kibana-pull}149133[#149133] and {kibana-pull}149104[#149104]
+
+Infrastructure::
+Fixes an issue where the summary request piled up {kibana-pull}148670[#148670]
+
+Machine Learning::
+* Fixes the bucket span estimator in the advanced wizard {kibana-pull}149008[#149008]
+* Fixes the transforms JSON display {kibana-pull}147996[#147996]
+
+Management::
+* Fixes the runtime field format editor {kibana-pull}148497[#148497]
+* Improves the check for response size in the `/autocomplete_entities` endpoint {kibana-pull}148328[#148328]
+
+Maps::
+Fixes an issue where Maps was unable to  initialize the time range from URLs {kibana-pull}148465[#148465]
+
+Platform::
+Fixes the server-side import of the contract `CloudStart` {kibana-pull}149203[#149203]
+
+Uptime::
+* ssl fields are now omitted when ssl is disabled {kibana-pull}149087[#149087]
+* Adds the ability to disable throttling for project monitors {kibana-pull}148669[#148669]
+
 [[release-notes-8.6.0]]
 == {kib} 8.6.0