third_party/go: fix vbom.ml dependency

Looks like .ml DNS servers are currently down, and this repository
import path is deprecated anyway. Really, we should bump Kubernetes...

Change-Id: I3e0c834a49ccf1111b9412371489bae5f80ff6ab
diff --git a/third_party/go/repositories.bzl b/third_party/go/repositories.bzl
index 12edfe1..2eb8499 100644
--- a/third_party/go/repositories.bzl
+++ b/third_party/go/repositories.bzl
@@ -84,9 +84,11 @@
     )
 
     go_repository(
-        name = "ml_vbom_util",
-        commit = "db5cfe13f5cc",
-        importpath = "vbom.ml/util",
+        name = "ml_vbom_util_sortorder",
+        commit = "26fad50c6b32a3064c09ed089865c16f2f3615f6",
+        importpath = "vbom.ml/util/sortorder",
+        remote = "https://github.com/fvbommel/sortorder",
+        vcs = "git",
     )
 
     go_repository(