Bump the markup cache version for URI changes
Summary:
Ref T13250. Ref T13249. Some remarkup rules, including `{image ...}` and `{meme ...}`, may cache URIs as objects because the remarkup cache is `serialize()`-based.
URI objects with `query` cached as a key-value map are no longer valid and can raise `__toString()` fatals.
Bump the cache version to purge them out of the cache.
Test Plan: See PHI1074.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T13250, T13249
Differential Revision: https://secure.phabricator.com/D20160