docs: Gesture Navigation page is outdated

[Omico]

https://github.com/slackhq/circuit/blob/37d88b954abab14e89be1bdce59e597be8e1b467/docs/circuitx/gesture-navigation.md?plain=1#L9C1-L21C4

GestureNavigationDecoration doesn't exist. Seems we should use the following code instead.

NavigableCircuitContent(
    navigator = navigator,
    backStack = backstack,
    decoratorFactory = GestureNavigationDecorationFactory(
        // Pop the back stack once the user has gone 'back'
        onBackInvoked = navigator::pop,
    ),
)

[stagg]

Yup, missed updating this, thanks for reporting!

Should be fixed now https://slackhq.github.io/circuit/circuitx/gesture-navigation/