Update trademark information

Update https://doc.qt.io/qt-6/trademarks.html:

• Update list of registered trademarks to:
  • Qt logo, axivion stopping software erosion logo, Qt Group logo,
  • Qt®
  • Axivion®
  • avixion stopping software erosion®
  • Boot to Qt®
  • Built with Qt®
  • Coco®
  • froglogic®
  • Qt Cloud Services®
  • Qt Developer Days®
  • Qt Embedded®
  • Qt Enterprise®
  • Qt Group®
  • Qt Mobile®
  • Qt Quick®
  • Qt Quick Compiler®
  • Squish®

• replace 'are registered trademarks of The Qt Company Ltd.' with 'are registered trademarks of The Qt Company Ltd. or its subsidiaries.'

You could also add a link to https://www.qt.io/trademark/