Fix history.md

Author: blowdart

history.md

@@ -8,11 +8,14 @@
 
 * Added extra validation to `Cid`.
 
+#### idunno.Bluesky
+
+* Bookmark support, `CreateBookmark()`, `DeleteBookmark()`, `GetBookmarks()` and the `BookmarkCount` property on `PostView`.
+
 ### Bug Fixes
 
 #### idunno.AtProto
 
-* Bookmark support, `CreateBookmark()`, `DeleteBookmark()`, `GetBookmarks()` and the `BookmarkCount` property on `PostView`.
 * Fixed `TimeStampIdentifier` generation to generate correct values.
 
 ### Documentation