fix contributors (nightscout#4260)

* fix typo in contributors

* fix typo

CONTRIBUTING.md

@@ -146,7 +146,7 @@ Also if you can't code, it's possible to contribute by improving the documentati
 
 ### Core developers, contributing developers, coordinators and documentation writers
 
-[@andrew-warrington] https://github.com/andrew-warrington
+[@andrew-warrington]: https://github.com/andrew-warrington
 [@apanasef]: https://github.com/apanasef
 [@bewest]: https://github.com/bewest
 [@danamlewis]: https://github.com/danamlewis
@@ -248,8 +248,8 @@ Languages with less than 90% coverage will be removed in a future Nightscout ver
 | Slovenčina (`sk`)|Please volunteer|OK|
 | Svenska (`sv`)|Please volunteer|OK|
 | 中文（简体） (`zh_cn`) | [@jizhongwen]|OK|
-| 中文（繁體） (`zh_tw`) | [@jizhongwen]|Needs attention: 25.0%]
-| 日本語 (`ja_jp`) | [@LuminaryXion]|]
+| 中文（繁體） (`zh_tw`) | [@jizhongwen]|Needs attention: 25.0%
+| 日本語 (`ja_jp`) | [@LuminaryXion]|
 
 
 ### List of all contributors