Summary: Update fully-mono-themes

diff --git a/fully-mono-themes b/fully-mono-themes
index e87bf093d1f03ecb43c29949a4ce266e8dbdc274..423348c16151bb482f0ec796965a2c6c0db1a256 160000 (submodule)
--- a/fully-mono-themes
+++ b/fully-mono-themes
@@ -1 +1 @@
-Subproject commit e87bf093d1f03ecb43c29949a4ce266e8dbdc274
+Subproject commit 423348c16151bb482f0ec796965a2c6c0db1a256