weechat: update wee-slack to support now session tokens

diff --git a/weechat/python/wee-slack b/weechat/python/wee-slack
index 76c1d0977b528e2030e02693b2e11de54ac4d44a..08d98a0e963d46816bc2202f9c33e858218e6b3e 160000 (submodule)
--- a/weechat/python/wee-slack
+++ b/weechat/python/wee-slack
@@ -1 +1 @@
-Subproject commit 76c1d0977b528e2030e02693b2e11de54ac4d44a
+Subproject commit 08d98a0e963d46816bc2202f9c33e858218e6b3e