R1:c24f4411c161

Fix a string in PhabricatorObjectHandleData

Summary: This got copy/pasted at some point long in the past, it should clearly read "Task".

Test Plan: Looked at the rest of the strings.

Reviewers: btrahan, vrana

Reviewed By: vrana

CC: aran

Differential Revision: https://secure.phabricator.com/D3774