Add Gerrit 3.13.1 and set as latest release

Change-Id: If987276c657ab59ca56fa059261c372e8b0078eb
diff --git a/gerrit.rb b/gerrit.rb
index 7e4974b..0e16480 100644
--- a/gerrit.rb
+++ b/gerrit.rb
@@ -10,8 +10,8 @@
 
   set_common_dependencies
 
-  version "3.13.0"
-  sha256 "df55706b98b61505c4d297e0470960b20421c56d715dc4f916dad961c407fe71"
+  version "3.13.1"
+  sha256 "068fd0fb5d2b114872381742ec328891bc3825608c2e6c3865a359978eeb939a"
   url generate_url(version)
 
 end
diff --git a/gerrit@3.13.1.rb b/gerrit@3.13.1.rb
new file mode 100644
index 0000000..68f7143
--- /dev/null
+++ b/gerrit@3.13.1.rb
@@ -0,0 +1,17 @@
+# typed: false
+# frozen_string_literal: true
+
+require_relative "./gerritbase"
+
+class GerritAT3131 < GerritBase
+  def self.java_version
+    "21"
+  end
+
+  set_common_dependencies
+
+  version "3.13.1"
+  sha256 "068fd0fb5d2b114872381742ec328891bc3825608c2e6c3865a359978eeb939a"
+  url generate_url(version)
+
+end