`await` not parse properly after `in`

[WhyNotHugo]

In this specific example, the await keyword isn't being properly highlighted:

async def region_exists(region: str) -> bool:
    return region in await all_regions()
#                    ^^^^^ This keyword is not highlighted properly

Huh, it seems that GitHub also doesn't highlight it properly.

[obataku]

Huh, it seems that GitHub also doesn't highlight it properly.

github/linguist uses tree-sitter-python for its highlighting