fix: Show FeaturedTag.last_status_at as a date (#1566)

* fix: FeaturedTag.last_status_at is a date

* Update example

content/en/entities/FeaturedTag.md

@@ -20,7 +20,7 @@ aliases: [
   "name": "nowplaying",
   "url": "https://mastodon.social/@trwnh/tagged/nowplaying",
   "statuses_count": "70",
-  "last_status_at": "2022-08-29T12:03:35.061Z"
+  "last_status_at": "2022-08-29"
 }
 ```
 
@@ -56,8 +56,8 @@ aliases: [
 
 ### `last_status_at` {#last_status_at}
 
-**Description:** The timestamp of the last authored status containing this hashtag.\
-**Type:** String ([Datetime](/api/datetime-format#datetime))\
+**Description:** The date of the last authored status containing this hashtag.\
+**Type:** String ([Date](/api/datetime-format#date))\
 **Version history:**\
 3.0.0 - added