@astrojs/starlight 0.32.6

#3030 5bdf139 Thanks @trueberryless! - Updates the type of the isFallback field in route data from true to boolean, keeping it optional but allowing false as a possible value.
#3018 188b8cf Thanks @trueberryless! - Adds validation for user config routeMiddleware so it does not conflict with Astro's middleware.