Fix typo in FromRow docs
Fixes typo: manuel to manual.
@@ -126,7 +126,7 @@ use crate::row::Row;
/// ## Manual implementation
///
/// You can also implement the [`FromRow`] trait by hand. This can be useful if you
-/// have a struct with a field that needs manuel decoding:
+/// have a struct with a field that needs manual decoding:
///
///
/// ```rust,ignore
