BrowserStorage: Add another warning

plugins/tiddlywiki/browser-storage/readme.tid

@@ -16,4 +16,4 @@ Please use this plugin with caution. There are a number of unresolved issues and
 * Innerwikis read the local storage of their parent wikis
 * This plugin does not interfere with the existing saver mechanism, so you'll still get warnings when refreshing the page, even if your changes are safely committed to local storage
 * Deleted tiddlers will be restored when the wiki is refreshed
-
+* There is a possibility that tiddlers might be transferred between different wikis if they are accessed via the same URL. This is particularly likely when running in local client server configuration under Node.js