Add Fleet & Agent 8.16.2 Release Notes (#1538)

* Add Fleet & Agent 8.16.2 Release Notes

* touchup

* Update wolfi note

docs/en/ingest-management/release-notes/release-notes-8.16.asciidoc

@@ -14,6 +14,7 @@
 
 This section summarizes the changes in each release.
 
+* <<release-notes-8.16.2>>
 * <<release-notes-8.16.1>>
 * <<release-notes-8.16.0>>
 
@@ -22,11 +23,34 @@ Also see:
 * {kibana-ref}/release-notes.html[{kib} release notes]
 * {beats-ref}/release-notes.html[{beats} release notes]
 
-// begin 8.16.0 relnotes
+// begin 8.16.2 relnotes
+
+[[release-notes-8.16.2]]
+== {fleet} and {agent} 8.16.2
+
+Review important information about the {fleet} and {agent} 8.16.2 release.
+
+[discrete]
+[[enhancements-8.16.2]]
+=== Enhancements
+
+In this release we've introduced an image based on the hardened link:https://github.com/wolfi-dev/[Wolfi] image to provide additional security to our self-managed customers, and improve our supply chain security posture. Wolfi-based images require Docker version 20.10.10 or higher.
+
+{agent}::
+* Perform check for an external package manager only at startup. {agent-pull}6178[#6178] {agent-issue}5835[#5835] {agent-issue}5991[#5991]
+* Remove some unnecessary copies when generating component configuration. {agent-pull}6184[#6184] {agent-issue}5835[#5835] {agent-issue}5991[#5991]
+* Use xxHash instead of sha256 for hashing AST nodes when generating component configuration. {agent-pull}6192[#6192] {agent-issue}5835[#5835] {agent-issue}5991[#5991]
+* Cache conditional sections when applying variables to component configuration. {agent-pull}6229[#6229] {agent-issue}5835[#5835] {agent-issue}5991[#5991]
+
+// end 8.16.2 relnotes
+
+// begin 8.16.1 relnotes
 
 [[release-notes-8.16.1]]
 == {fleet} and {agent} 8.16.1
 
+Review important information about the {fleet} and {agent} 8.16.1 release.
+
 [discrete]
 [[bug-fixes-8.16.1]]
 === Bug fixes