Update a docs (#423)

* Add methods for Confluence docs

Author: gonchik

atlassian/jira.py

@@ -2080,7 +2080,7 @@ def tempo_teams_add_member(self, team_id, member_key):
         """
         Add team member
         :param team_id:
-        :param member_key:
+        :param member_key: user_name or user_key of Jira
         :return:
         """
         data = {"member": {"key": str(member_key), "type": "USER"},