Apply suggestions from code review

Author: tkoyama010

README.md

@@ -15,7 +15,7 @@ pyOpenSci is devoted to building diverse, supportive community around
 the Python open source tools that drive open science. We do this through:
 
 * open peer review
-* mentorshipd
+* mentorship
 * training
 
 pyOpenSci is an independent organization, fiscally sponsored by Community