Partially updates an existing Team. Writable fields: name, description, leader, parent, average_daily_rate (when human cost feature is enabled). The parent field follows the same hierarchy rules as team creation: it must reference a team from the level directly above the team's level, or be null only when the team is at the highest level in the workspace. AI configuration fields (ai_role_definition, ai_scopes_included, ai_scopes_excluded, ai_min_milestones_per_project, ai_max_milestones_per_project) can only be set on level-1 teams.