Add docs for rename_all attribute for Type derive macro (#1212)

* add missing closing bracket in doctest

* document rename_all attribute for Type derive

sqlx-core/src/types/mod.rs

@@ -117,6 +117,7 @@ pub use json::Json;
 ///   `<SQL type name>` instead. May trigger errors or unexpected behavior if the encoding of the
 ///   given type is different than that of the inferred type (e.g. if you rename the above to
 ///   `VARCHAR`). Affects Postgres only.
+/// * `#[sqlx(rename_all = "<strategy>")]` on struct definition: See [`derive docs in FromRow`](crate::from_row::FromRow#rename_all)
 ///
 /// ### Enumeration
 ///

src/macros.rs

@@ -245,7 +245,7 @@
 /// # async fn main() {
 /// # let mut conn = panic!();
 /// #[derive(sqlx::Type)]
-/// #[sqlx(transparent)
+/// #[sqlx(transparent)]
 /// struct MyInt4(i32);
 ///
 /// let my_int = MyInt4(1);