Bump crengine for small style fixes (#3981)
Bump crengine for small style fixes (#3981)

- Make the <style> element hidden by default
- epub.css: display <pre> and <code> with a monospace font
poire-z/koreader,Frenzie/koreader,houqp/koreader,Hzj-jie/koreader,NiLuJe/koreader,pazos/koreader,koreader/koreader,mwoz123/koreader,poire-z/koreader,mihailim/koreader,Frenzie/koreader,NiLuJe/koreader,lgeek/koreader,koreader/koreader,Markismus/koreader