typo in storage message
Test Plan:
I didn't put any skill points in spelling since I need
combat skills to survive in a nuclear wasteland, but spell check says
this is better.
Reviewers: Blessed Reviewers, epriestley
Reviewed By: Blessed Reviewers, epriestley
Subscribers: epriestley
Differential Revision: https://secure.phabricator.com/D14522