Gerrit v3.14 release notes: warn about breakage of plugins

Change-Id: Ibf86ee09a2dc8e84f195f53536b901b1870932bd

pages/site/releases/3.14.md

diff --git a/pages/site/releases/3.14.md b/pages/site/releases/3.14.md
index 706d02b..6b83ad3 100644
--- a/pages/site/releases/3.14.md
+++ b/pages/site/releases/3.14.md
@@ -252,6 +252,14 @@
    This change requires plugin developers to correctly adapt their REST endpoints
    in case it returns 500.
 
+* [Change 517822](https://gerrit-review.googlesource.com/c/gerrit/+/517822)
+Use rules_jvm_external instead of homebrew maven_jar rule
+
+   Gerrit historical use of custom fetch and export of Maven artifacts,
+   is removed and all existing dependencies are exported with a different name,
+   causing the potential breakage of existing plugins relying on Gerrit's
+   exported transitive dependencies.
+
 ## Permissions & Security Changes
 
 * The project configuration changes now require to have a contributor agreement