Add Fleet Server and Elastic Agent release notes for 8.17.10 (#1845)

* add fleet server and elastic agent release notes for 8.17.10

* apply suggestions from code review

Co-authored-by: Visha Angelova <[email protected]>

---------

Co-authored-by: Visha Angelova <[email protected]>

Author: colleenmcginnis

docs/en/ingest-management/release-notes/release-notes-8.17.asciidoc

@@ -14,6 +14,7 @@
 
 This section summarizes the changes in each release.
 
+* <<release-notes-8.17.10>>
 * <<release-notes-8.17.9>>
 * <<release-notes-8.17.8>>
 * <<release-notes-8.17.7>>
@@ -30,6 +31,23 @@ Also see:
 * {kibana-ref}/release-notes.html[{kib} release notes]
 * {beats-ref}/release-notes.html[{beats} release notes]
 
+// begin 8.17.10 relnotes
+
+[[release-notes-8.17.10]]
+== {fleet} and {agent} 8.17.10
+
+Review important information about the 8.17.10 release.
+
+[discrete]
+[[bug-fixes-8.17.10]]
+=== Bug fixes
+
+Fleet Server::
+
+* Fix upgrade details `download_rate` as string handling. {fleet-server-pull}5219[#5219] {fleet-server-pull}5225[#5225] {fleet-server-pull}5176[#5176] {fleet-server-issue}5164[#5164]
+
+// end 8.17.10 relnotes
+
 // begin 8.17.9 relnotes
 
 [[release-notes-8.17.9]]