chore: bump react-navigation submodule with fixes for header behavi…

…our (#2187)

## Description

I've recently merged 

* react-navigation/react-navigation#12014

with partial fix for header behaviour. Bumping the submodule here so
that examples work correctly.

## Test code and steps to reproduce

See: react-navigation/react-navigation#12014

## Checklist

- [ ] Ensured that CI passes