Added @stoneG for typo fix #754. Thank you!

Author: tomchristie

docs/topics/credits.md

@@ -112,6 +112,7 @@ The following people have helped make REST framework great.
 * Bouke Haarsma - [bouke]
 * Pierre Dulac - [dulaccc]
 * Dave Kuhn - [kuhnza]
+* Sitong Peng - [stoneg]
 
 Many thanks to everyone who's contributed to the project.
 
@@ -258,3 +259,4 @@ You can also contact [@_tomchristie][twitter] directly on twitter.
 [bouke]: https://github.com/bouke
 [dulaccc]: https://github.com/dulaccc
 [kuhnza]: https://github.com/kuhnza
+[stoneg]: https://github.com/stoneg