Hygiene: Update summarize test case after dependency update
Hygiene: Update summarize test case after dependency update

The behavior of sanitize-html changed slighly between 1.19.1 and 1.19.2,
apparently due to its own dependency switch from postcss to css-tree.[1]
This broke one test case in summarize.unit.js.  The new behavior is
preferable, so the test case is updated.

[1] https://github.com/punkave/sanitize-html/commit/60a2f42659fd36414033dec1208596351930044e

Change-Id: I26eef7c9389f73fc3c95801460896cf6dab0ae10

wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps,wikimedia/mediawiki-services-mobileapps