weechat: update wee-slack

diff --git a/weechat/python/wee-slack b/weechat/python/wee-slack
index 00093fa633b3a602384864f54167e90f7cffe336..76ccd47a404b9f2ad8ba34750b473371b6cff5a6 160000 (submodule)
--- a/weechat/python/wee-slack
+++ b/weechat/python/wee-slack
@@ -1 +1 @@
-Subproject commit 00093fa633b3a602384864f54167e90f7cffe336
+Subproject commit 76ccd47a404b9f2ad8ba34750b473371b6cff5a6