docs: grammar fixes (#6345)

src/structures/GuildTemplate.js

@@ -205,7 +205,7 @@ class GuildTemplate extends Base {
   }
 
   /**
-   * When concatenated with a string, this automatically returns the templates's code instead of the template object.
+   * When concatenated with a string, this automatically returns the template's code instead of the template object.
    * @returns {string}
    * @example
    * // Logs: Template: FKvmczH2HyUf

src/structures/Team.js

@@ -80,7 +80,7 @@ class Team extends Base {
   }
 
   /**
-   * A link to the teams's icon.
+   * A link to the team's icon.
    * @param {StaticImageURLOptions} [options={}] Options for the Image URL
    * @returns {?string}
    */

src/structures/TeamMember.js

@@ -50,7 +50,7 @@ class TeamMember extends Base {
   }
 
   /**
-   * When concatenated with a string, this automatically returns the team members's mention instead of the
+   * When concatenated with a string, this automatically returns the team member's mention instead of the
    * TeamMember object.
    * @returns {string}
    * @example