Bump unison submodule

ChrisPenner · ChrisPenner · commit f6bb8c231ff1 · 2024-12-13T12:15:01.000-08:00
diff --git a/unison b/unison
@@ -1 +1 @@
-Subproject commit 40eac6a121a5edb8e083523b769aa656df0fa54e
+Subproject commit 6c435ebd1b49f6075f294bb764a0624e4d511cdb
