Update documentation on how to load qwebchannel.js with qrc change


The qrc scheme is now local, so can only be loaded from other local
schemes by default, so document how then to load qwebchannel.js if
needed from a remote page.

Pick-to: 6.12 6.12.0
Task-number: QTBUG-148477
Change-Id: Ie476f81b331ae9bfdabf18ec2dce64dd1fcc6762
Reviewed-by: Michal Klocek <michal.klocek@qt.io>
commit2f32eef762f5fbc825b39b3f77d23cf9bb5a5843
parent158b7dca9a101a6c0488612fd28272430c06df4e
authorAllan Sandfeld Jensen <allan.jensen@qt.io>
committerAllan Sandfeld Jensen <allan.jensen@qt.io>
commit timeThu, 10 Sep 2026 10:49:03 +0000