[DOCS] Add 8.10.1 release notes (elastic#166549)

(cherry picked from commit be38c9d)

docs/CHANGELOG.asciidoc

@@ -14,6 +14,7 @@ endif::[]
 
 Review important information about the {kib} 8.x releases.
 
+* <<release-notes-8.10.1>>
 * <<release-notes-8.10.0>>
 * <<release-notes-8.9.2>>
 * <<release-notes-8.9.1>>
@@ -52,6 +53,26 @@ Review important information about the {kib} 8.x releases.
 * <<release-notes-8.0.0-alpha1>>
 
 --
+[[release-notes-8.10.1]]
+== {kib} 8.10.1
+
+The 8.10.1 release includes the following bug fixes.
+
+[float]
+[[fixes-v8.10.1]]
+=== Bug Fixes
+
+Dashboard::
+* Fixes content editor flyout footer ({kibana-pull}165907[#165907]).
+Elastic Security::
+For the Elastic Security 8.10.1 release information, refer to {security-guide}/release-notes.html[_Elastic Security Solution Release Notes_].
+Fleet::
+* Show snapshot version in agent upgrade modal and allow custom values ({kibana-pull}165978[#165978]).
+Observability::
+* Fix(slo): Use comma-separarted list of source index for transform ({kibana-pull}166294[#166294]).
+Presentation::
+* Fixes air-gapped enviroment hitting `400` error when loading fonts for layer ({kibana-pull}165986[#165986]).
+
 [[release-notes-8.10.0]]
 == {kib} 8.10.0