5 triggers in the Channels category.
Channel Created
channel_create
Triggers when a new channel is created.
Channel Update
channel_update
Triggers when a channel is updated.
Channel Deleted
channel_delete
Triggers when a channel is deleted.
Channel Pins Update
channel_pins_update
Triggers when a channel's pins are updated.
Voice State Update
voice_state_update
Triggers when a member joins, leaves, or moves voice channels.