Update README.md

Author: dkastl

README.md

@@ -63,11 +63,11 @@ See [all releases](https://github.com/gtt-project/redmine_gtt/releases) with rel
 
 ## Authors
 
-  - [Jens Kraemer](https://github.com/jkraemer)
-  - [Daniel Kastl](https://github.com/dkastl)
-  - [Thibault Mutabazi](https://github.com/eyewritecode)
-  - [Ko Nagase](https://github.com/sanak)
-  - ... [and others](https://github.com/gtt-project/redmine_gtt/graphs/contributors)
+- [Jens Kraemer](https://github.com/jkraemer)
+- [Daniel Kastl](https://github.com/dkastl)
+- [Thibault Mutabazi](https://github.com/eyewritecode)
+- [Ko Nagase](https://github.com/sanak)
+- ... [and others](https://github.com/gtt-project/redmine_gtt/graphs/contributors)
 
 ## LICENSE