[DOCS]: Adds Connectors release note for 8.18.3 (#129862)

Author: charlotte-hoblik

docs/reference/connector/docs/connectors-release-notes.asciidoc

@@ -36,6 +36,20 @@ PR https://github.com/elastic/connectors/pull/3577[*#3577*] resolves this issue
 
 There are no new features, enhancements, fixes, known issues, or deprecations associated with this release.
 
+[discrete]
+[[es-connectors-release-notes-8-18-3]]
+=== 8.18.3
+
+[discrete]
+[[es-connectors-release-notes-8-18-3-enhancements]]
+==== Enhancements
+
+* Improve UUID handling by correctly parsing type 4 UUIDs and skipping unsupported type 3 with a warning.
+See https://github.com/elastic/connectors/pull/3459[*PR 3459*].
+
+* Confluence connector no longer swallows errors that may occur during ingestion.
+See https://github.com/elastic/connectors/pull/3384[*PR 3384*].
+
 [discrete]
 [[es-connectors-release-notes-8-18-0]]
 === 8.18.0