Updates unison

diff --git a/modules/unison b/modules/unison
index 24618215387f1a305212c4429cce97d8a64fa4d3..694a28b20f323fb50541eaf0f5e8a926fef538a7 160000 (submodule)
--- a/modules/unison
+++ b/modules/unison
@@ -1 +1 @@
-Subproject commit 24618215387f1a305212c4429cce97d8a64fa4d3
+Subproject commit 694a28b20f323fb50541eaf0f5e8a926fef538a7