changelog: add changelog entry for 8.16.1 (#14690) (#14698)

(cherry picked from commit 0b652e2)

Co-authored-by: Kostiantyn Masliuk <[email protected]>

changelogs/8.16.asciidoc

@@ -1,7 +1,30 @@
 [[apm-release-notes-8.16]]
 == APM version 8.16
+
+* <<apm-release-notes-8.16.1>>
 * <<apm-release-notes-8.16.0>>
 
+[float]
+[[apm-release-notes-8.16.1]]
+=== APM version 8.16.1
+
+https://github.com/elastic/apm-server/compare/v8.16.0\...v8.16.1[View commits]
+
+[float]
+==== Bug fixes
+
+[float]
+==== Breaking Changes
+
+[float]
+==== Deprecations
+
+[float]
+==== Intake API Changes
+
+[float]
+==== Added
+
 [float]
 [[apm-release-notes-8.16.0]]
 === APM version 8.16.0