Update BridgeComponent extension example

[indigotechtutorials]

This adds a small change to the quick start guide documentation to use nonisolated keyword to avoid errors on new Xcode apps

#34

[indigotechtutorials]

I'm not sure why the Turbo Demo runs fine without issue though
@joemasilotti maybe you could check out the code for my IOS App just a simple project to test Strada
https://github.com/indigotechtutorials/strada-submit
Otherwise I think this a great update to the guide as I struggled with this for hours this morning

[ghiculescu]

Thanks, this saved me heaps of debugging too ❤️

Lots of stuff in #29 references @mainactor. Maybe it's related. The demo targets commit 3f8e6a0 which is before that PR, so maybe something broke between those two points.

cc @svara