Upgrade wiremock to 2.26.1

Change-Id: Ib3caddd003fd3d35e654d98e3df05d69108f5c1e
diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index 9e7d7f7..27acdfe 100644
--- a/external_plugin_deps.bzl
+++ b/external_plugin_deps.bzl
@@ -3,8 +3,8 @@
 def external_plugin_deps():
     maven_jar(
         name = "wiremock",
-        artifact = "com.github.tomakehurst:wiremock-standalone:2.26.0",
-        sha1 = "c0a192a3fd43b265ff4bc6014d64920d7c6e4174",
+        artifact = "com.github.tomakehurst:wiremock-standalone:2.26.1",
+        sha1 = "7eba948f08ae7ad0c26d5ae63e90dbac945e51b0",
     )
 
     maven_jar(