Hints for kjots in main

Hints

• asv-content-rating-missing
  org.kde.kjots.appdata.xml -
  This component has no `content_rating` tag to provide age rating information. You can generate the tag data online by answering a few questions at https://hughsie.github.io/oars/
• asv-screenshot-media-url-not-secure
  org.kde.kjots.appdata.xml:274 - http://kde.org/images/screenshots/kjots.png
  Consider using a secure (HTTPS) URL to reference this screenshot image or video.
• asv-description-first-para-too-short
  org.kde.kjots.appdata.xml:66 - KJots organises all of your notes into separate books.
  The first `description/p` paragraph of this component might be too short (< 80 characters). Please consider starting with a longer paragraph to improve how the description looks like in software centers and to provide more detailed information on this component immediately in the first paragraph.