Update CHANGELOG.md

Author: gsl-anthonymerle

CHANGELOG.md

@@ -13,7 +13,7 @@
 
 ## Master
 
-- Add `.xctestplan` extension to available file extensions [@gsl-anthonymerle](https://github.com/gsl-anthonymerle) - [653](https://github.com/danger/swift/pull/653)
+- Add `.xctestplan` extension to available file extensions [@gsl-anthonymerle]() - [#653](https://github.com/danger/swift/pull/653)
 
 ## 3.21.2