Fix formating of contributers.yml file (#382)

Author: GeorgiLH

_data/contributors.yml

@@ -365,7 +365,8 @@
        tested and employed in the project.
       mentors: Vassil Vassilev
       proposal: /assets/docs/GeorgiHaralanovProposition.pdf
-  name: Ivan Velev
+
+- name: Ivan Velev
   active: 1
   photo: IvanVelev.jpg
   info: High School Student