awesome: update pomodoro submodule

diff --git a/awesome/widgets/pomodoro b/awesome/widgets/pomodoro
index c2f8eae0f97f66206cf6999eadbb6d18c21f5970..b7aca69dd5c74df33f6cc7e3902578cc71f582ce 160000 (submodule)
--- a/awesome/widgets/pomodoro
+++ b/awesome/widgets/pomodoro
@@ -1 +1 @@
-Subproject commit c2f8eae0f97f66206cf6999eadbb6d18c21f5970
+Subproject commit b7aca69dd5c74df33f6cc7e3902578cc71f582ce