weechat: update wee-slack

diff --git a/weechat/python/wee-slack b/weechat/python/wee-slack
index 64a43951685bca2c199efd2543770693f2bcfa78..76c1d0977b528e2030e02693b2e11de54ac4d44a 160000 (submodule)
--- a/weechat/python/wee-slack
+++ b/weechat/python/wee-slack
@@ -1 +1 @@
-Subproject commit 64a43951685bca2c199efd2543770693f2bcfa78
+Subproject commit 76c1d0977b528e2030e02693b2e11de54ac4d44a