Merge inlinecallbacks-docs-typo-7643: Fix typo in inlincallbacks documentation.

Author: Alex
Reviewer: khorn
Fixes: #7643

This fixes a capitalization typo in the docsting for inlineCallbacks.

git-svn-id: svn://svn.twistedmatrix.com/svn/Twisted/trunk@43137 bbbe8e31-12d6-0310-92fd-ac37d47ddeeb