Added @krzysiekj

For work on #1034.  Thanks!

docs/topics/credits.md

@@ -160,6 +160,7 @@ The following people have helped make REST framework great.
 * Christopher Paolini - [chrispaolini]
 * Filipe A Ximenes - [filipeximenes]
 * Ramiro Morales - [ramiro]
+* Krzysztof Jurewicz - [krzysiekj]
 
 Many thanks to everyone who's contributed to the project.
 
@@ -356,3 +357,4 @@ You can also contact [@_tomchristie][twitter] directly on twitter.
 [chrispaolini]: https://github.com/chrispaolini
 [filipeximenes]: https://github.com/filipeximenes
 [ramiro]: https://github.com/ramiro
+[krzysiekj]: https://github.com/krzysiekj