Added @gertjanol for work on #976 - thank you :)

docs/topics/credits.md

@@ -145,6 +145,7 @@ The following people have helped make REST framework great.
 * Philip Douglas - [freakydug]
 * Igor Kalat - [trwired]
 * Rudolf Olah - [omouse]
+* Gertjan Oude Lohuis - [gertjanol]
 
 Many thanks to everyone who's contributed to the project.
 
@@ -326,3 +327,4 @@ You can also contact [@_tomchristie][twitter] directly on twitter.
 [freakydug]: https://github.com/freakydug
 [trwired]: https://github.com/trwired
 [omouse]: https://github.com/omouse
+[gertjanol]: https://github.com/gertjanol