docs: fix invalid email address

Author: arjunkdot

CODE_OF_CONDUCT.md

@@ -36,7 +36,7 @@ This Code of Conduct applies within all project spaces, and it also applies when
 
 ## Enforcement
 
-Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project maintainer at arjunkdot[dot]gmail[dot]com. All complaints will be reviewed and investigated and will result in a response that is deemed necessary and appropriate to the circumstances. Maintainers are obligated to maintain confidentiality with regard to the reporter of an incident.
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project maintainer at arjunkdot[at]gmail[dot]com. All complaints will be reviewed and investigated and will result in a response that is deemed necessary and appropriate to the circumstances. Maintainers are obligated to maintain confidentiality with regard to the reporter of an incident.
 
 ## Attribution