backport: docs improvements

src/structures/TextChannel.js

@@ -52,6 +52,11 @@ class TextChannel extends GuildChannel {
   /**
    * Fetch all webhooks for the channel.
    * @returns {Promise<Collection<Snowflake, Webhook>>}
+   * @example
+   * // Fetch webhooks
+   * channel.fetchWebhooks()
+   *   .then(hooks => console.log(`This channel has ${hooks.size} hooks`))
+   *   .catch(console.error);
    */
   fetchWebhooks() {
     return this.client.rest.methods.getChannelWebhooks(this);