Bump events-broker to version 3.5.1

Change-Id: Ie58ab90db74542dcaff2e2c658bcab06ab3c33e2

external_plugin_deps.bzl

diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index 2ed72d8..9e44a2e 100644
--- a/external_plugin_deps.bzl
+++ b/external_plugin_deps.bzl
@@ -121,8 +121,8 @@
 
     maven_jar(
         name = "events-broker",
-        artifact = "com.gerritforge:events-broker:3.5.0-alpha-202108041529",
-        sha1 = "309fe8cc08c46593d9990d4e5c448cc85e5a62b0",
+        artifact = "com.gerritforge:events-broker:3.5.1",
+        sha1 = "78b8bc6ad7fd7caadcc1c6e3484332464de0ac38",
     )
 
     maven_jar(