Fix "trough" typo in Model Config docs
@@ -55,7 +55,7 @@ Similarly, if using the `@dataclass` decorator:
**`fields`**
: a `dict` containing schema information for each field; this is equivalent to
using [the `Field` class](schema.md), except when a field is already
- defined trough annotation or the Field class, in which case only
+ defined through annotation or the Field class, in which case only
`alias`, `include`, `exclude`, `min_length`, `max_length`, `regex`, `gt`, `lt`, `gt`, `le`,
`multiple_of`, `max_digits`, `decimal_places`, `min_items`, `max_items`, `unique_items`
and allow_mutation can be set (for example you cannot set default of default_factory)
