Update contributor_code_of_conduct.md

Fix typo, closes issue 'particant' typo in the code of conduct. angular#2

Author: Coraline Ada Ehmke

contributor_code_of_conduct.md

@@ -3,6 +3,6 @@
 
 As contributors and maintainers of this project, we pledge to respect all people who contribute through reporting issues, posting feature requests, updating documentation,  submitting pull requests or patches, and other activities.
 
-If any particant in this project has issues or takes exception with a contribution, they are obligated to provide constructive feedback and never resort to personal attacks, trolling, public or private harrassment, insults, or other unprofessional conduct.
+If any participant in this project has issues or takes exception with a contribution, they are obligated to provide constructive feedback and never resort to personal attacks, trolling, public or private harrassment, insults, or other unprofessional conduct.
 
 We promise to extend courtesy and respect to everyone involved in this project regardless of gender, gender identity, sexual orientation, ability or disability, ethnicity, religion, or level of  experience.