Make unstable_pattern type of keyof Pages to match the format of href()

[linobino1]

I'm wondering why the unstable_pattern is missing a trailing slash. Adding the trailing slash and typing it as keyof Pages would allow for feeding the pattern back into the href function.

In my use case, I'm doing this to build canonical and translated URLs:

export async function loader({ params, unstable_pattern }: Route.LoaderArgs) {
  const translatedURLs = languages.map((language) =>
    href("/" + unstable_pattern, {
      ...params,
      language,
    })
  );

  // ...
}