Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  13cffd3a06892a0af5b74cd24644b843b447ea81

Hygiene: plaintext is better description of topic title content type

Nothing keys off this 'raw' value currently, so changing it should be safe.

Change-Id: I0fdb06773ced77de63863b0ce6307e8138ce914e