Fix readme links (#117)

* Fix links to sealed classes docs

* Update README.md

Co-authored-by: Adam <897017+aSemy@users.noreply.github.com>

* Update README.md

Co-authored-by: Adam <897017+aSemy@users.noreply.github.com>

---------

Co-authored-by: Adam <897017+aSemy@users.noreply.github.com>

Author: tamj0rd2

README.md

@@ -62,8 +62,8 @@ for working examples.
 | Enums                                 | ✅   [example](./docs/enums.md)                                  |                                                                                                                |
 | Lists                                 | ✅   [example](./docs/lists.md)                                  |                                                                                                                |
 | Maps                                  | ✅/⚠ [example](./docs/maps.md)                                   | Maps with complex keys are converted to an ES6 Map, [see documentation](./docs/maps.md#maps-with-complex-keys) |
-| Polymorphism - Sealed classes         | ✅/⚠ [example](./docs/polymorphism.md#sealed-classes)            | Nested sealed classes are ignored, [see documentation](./docs/polymorphism.md#nested-sealed-classes)           |
-| Polymorphism - Open classes           | ❌   [example](./docs/abstract-classes.md)                       | Not implemented. Converted to `type MyClass = any`                                                             |
+| Polymorphism - Sealed classes         | ✅/⚠ [example](./docs/polymorphism-sealed.md#sealed-classes)     | Nested sealed classes are ignored, [see documentation](./docs/polymorphism-sealed.md#nested-sealed-classes)    |
+| Polymorphism - Open classes           | ❌   [example](./docs/polymorphism-open.md)                       | Not implemented. Converted to `type MyClass = any`                                                             |
 | `@JsonClassDiscriminator`             | ❌                                                               | Not implemented                                                                                                |
-| JSON Content polymorphism             | ❌   [example](./docs/polymorphism.md#json-content-polymorphism) | Not implemented. Converted to `type MyClass = any`                                                             |
+| JSON Content polymorphism             | ❌   [example](./docs/polymorphism-open.md#json-content-polymorphism) | Not implemented. Converted to `type MyClass = any`                                                             |
 | Edge cases - circular dependencies    | ✅   [example](./docs/edgecases.md)                              |                                                                                                                |