Summary:
- Change the HIG link to hig.kde.org
- Changed the bugtracker link to include the icons component
- Changed the contact links to include all VDG chat rooms
- Slightly changed the wording

Reviewers: #vdg, ngraham

Reviewed By: #vdg, ngraham

Subscribers: alex-l, ngraham, kde-frameworks-devel

Tags: #frameworks

Differential Revision: https://phabricator.kde.org/D28923