docs: Typos, consistency and grammar fixes (#6811)

src/managers/GuildStickerManager.js

@@ -46,7 +46,7 @@ class GuildStickerManager extends CachedManager {
    * @param {GuildStickerCreateOptions} [options] Options
    * @returns {Promise<Sticker>} The created sticker
    * @example
-   * // Create a new sticker from a url
+   * // Create a new sticker from a URL
    * guild.stickers.create('https://i.imgur.com/w3duR07.png', 'rip')
    *   .then(sticker => console.log(`Created new sticker with name ${sticker.name}!`))
    *   .catch(console.error);