Bump the remarkup cache version after JIRA/Asana rule changes

Summary: See PHI1319. Ref T13291. Bump the remarkup cache version, since the old JIRA / Asana rules may exist in the partial cached representation of remarkup blocks from older versions.

Test Plan: Typed some comments with various formatting, saw remarkup work fine.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13291

Differential Revision: https://secure.phabricator.com/D20619