updated htmlpurifier bundle

What does this MR do?

see title

How confident are you it won't break things if deployed?

my testing on localhost looks good. Seems to work. @NerdyProjects, is this package even in action yet? If not, it should be safe to merge...

Checklist

• added a test, or explain why one is not needed/possible...
• no unrelated changes
• asked someone for a code review
• joined #foodsharing-beta channel at https://slackin.yunity.org
• added an entry to CHANGELOG.md (description, merge request link, username(s))