Updates unison

diff --git a/modules/unison b/modules/unison
index 7d39362886919be9bb3ce8196da30bfa1c6e3685..258411066129ebfdd39eefe3a809f1686888a125 160000 (submodule)
--- a/modules/unison
+++ b/modules/unison
@@ -1 +1 @@
-Subproject commit 7d39362886919be9bb3ce8196da30bfa1c6e3685
+Subproject commit 258411066129ebfdd39eefe3a809f1686888a125