docs: fix minor typo in AsyncRefCell comment
@@ -257,7 +257,7 @@ mod internal {
use std::pin::Pin;
impl<T> AsyncRefCell<T> {
- /// Borrow the cell's contents synchronouslym without creating an
+ /// Borrow the cell's contents synchronously without creating an
/// intermediate future. If the cell has already been borrowed and either
/// the existing or the requested borrow is exclusive, this function returns
/// `None`.
