docs(release-notes): Add retroactive mention of User Info Fetcher being experimental (#634)

* docs(release-notes): Add retroactive mention of User Info Fetcher being experimental

* Update modules/ROOT/pages/release-notes.adoc

Co-authored-by: Andrew Kenworthy <[email protected]>

---------

Co-authored-by: Andrew Kenworthy <[email protected]>

Author: NickLarsenNZ

modules/ROOT/pages/release-notes.adoc

@@ -103,6 +103,9 @@ Documentation::
 
 * Apache Spark: documentation has been added showing how to provision Spark dependencies
 
+* Open Policy Agent: N.B. As mentioned in the release 24.3, we will be actively building out the backends supported by the User Info Fetcher.
+This feature should be therefore be treated as experimental as we continue to extend and consolidate back-end handling and fine-tune the tool in general.
+
 Other product features::
 
 The following are selected product features provided by new versions available in this release: