Doc: Add pipeline improvements to release notes (#14193) (#14238)

(cherry picked from commit a78aebc)
Co-authored-by: Karen Metts <[email protected]>

Author: github-actions[bot]

docs/static/releasenotes.asciidoc

@@ -32,6 +32,11 @@ coming[8.3.0]
 [[notable-8.3.0]]
 ==== Performance improvements and notable issues fixed
 
+* {ls} is more efficient at fetching pipelines as of 8.3. 
+When a {ls} instance sends its pipeline IDs to {es} or central pipeline management in {kib}, it gets back only the pipeline configs that belong to that instance. 
+These enhancements required changes to both {ls} https://github.com/elastic/logstash/pull/14076[(#14076)] and {es} https://github.com/elastic/elasticsearch/pull/85847[(#85847)].
++ 
+These improvements dramatically decrease network load while also giving users the ability to control pipelines dynamically using wildcards.
 
 [[plugins-8.3.0]]
 ==== Plugin releases