Add breaking change warning for JRuby Scripting

Reference openhab/openhab-addons#13810.

Signed-off-by: Cody Cutrer <cody@cutrer.us>

distributions/openhab/src/main/resources/bin/update.lst

@@ -77,6 +77,7 @@ ALERT;WLED Binding: Binding now uses Bridge and Thing structure. Delete and add
 
 [3.4.0]
 ALERT;Automower Binding: Due to Husqvarna Authentication API change, bridge now requires application secret instead of username and password. Delete any existing bridge and re-add it, please make sure to update all automower things to use the newly added bridge.
+ALERT;JRuby Scripting Automation: The default `RUBYLIB` directory has changed to OPENHAB_CONF/automation/ruby/lib. Either explicitly configure the addon to use the previous value, or move any files to the new location.
 ALERT;JS Scripting Automation: 'setTimeout' and 'setInterval' return a timerId (a positive integer value) as in standard JS instead of an openHAB Timer.
 ALERT;Konnected Binding: Things needs to be recreated because of added Konnected Pro panel support and manual configuration of things.
 ALERT;LG webOS Binding: The undocumented action "sendRCButton" was removed while it is possible to achieve the same action with "sendButton"; in case you were using "sendButton" with ENTER or DELETE as parameter, you should now use the new action "sendKeyboard".