Apply suggestions from code review

Co-authored-by: Visha Angelova <91186315+vishaangelova@users.noreply.github.com>

Author: ebeahan

changelog/8.19.16.asciidoc

@@ -12,7 +12,7 @@ Review important information about the  8.19.16 release.
 
 
 
-* Fix missing authagent in uploadchunk. https://github.com/elastic/fleet-server/pull/7054[#7054] 
+* Fix missing `authAgent` in `UploadChunk`. https://github.com/elastic/fleet-server/pull/7020[#7020] 
 
 
 

changelog/8.19.16.yaml

@@ -6,7 +6,7 @@ entries:
         Validate that the uploading agent of the chunk has the permissions to write that chunk.
       component: fleet-server
       pr:
-        - https://github.com/elastic/fleet-server/pull/7054
+        - https://github.com/elastic/fleet-server/pull/7020
       issue: []
       impact: ""
       action: ""