Reduce minimum lead paragraph length
Reduce minimum lead paragraph length

The previous value was too much for some lead paragraphs.
It's probably even worse for Asian languages.

Bug: T135315
Change-Id: Ibda37e4c0d17f79a0b1690e069d88663323d7a49

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