Docs: move path converter into a separate section (#9524)

And remove note regarding only working with Django 2.x or above, as it's been a while the feature is present, and DRF only supports Django 4.2+.

I was looking for this but couldn't see it in the docs, having it in a separate section would make it easier to find and link to.

Moreover, as it stands, one might think that the feature is limited to SimpleRouter, while it's also available for DefaultRouter.

docs/api-guide/routers.md

@@ -142,6 +142,24 @@ The above example would now generate the following URL pattern:
 * URL path: `^users/{pk}/change-password/$`
 * URL name: `'user-change_password'`
 
+### Using Django `path()` with routers
+
+By default, the URLs created by routers use regular expressions. This behavior can be modified by setting the `use_regex_path` argument to `False` when instantiating the router, in this case [path converters][path-converters-topic-reference] are used. For example:
+
+    router = SimpleRouter(use_regex_path=False)
+
+The router will match lookup values containing any characters except slashes and period characters.  For a more restrictive (or lenient) lookup pattern, set the `lookup_value_regex` attribute on the viewset or `lookup_value_converter` if using path converters.  For example, you can limit the lookup to valid UUIDs:
+
+    class MyModelViewSet(mixins.RetrieveModelMixin, viewsets.GenericViewSet):
+        lookup_field = 'my_model_id'
+        lookup_value_regex = '[0-9a-f]{32}'
+
+    class MyPathModelViewSet(mixins.RetrieveModelMixin, viewsets.GenericViewSet):
+        lookup_field = 'my_model_uuid'
+        lookup_value_converter = 'uuid'
+
+Note that path converters will be used on all URLs registered in the router, including viewset actions.
+
 # API Guide
 
 ## SimpleRouter
@@ -160,30 +178,13 @@ This router includes routes for the standard set of `list`, `create`, `retrieve`
     <tr><td>{prefix}/{lookup}/{url_path}/</td><td>GET, or as specified by `methods` argument</td><td>`@action(detail=True)` decorated method</td><td>{basename}-{url_name}</td></tr>
 </table>
 
-By default the URLs created by `SimpleRouter` are appended with a trailing slash.
+By default, the URLs created by `SimpleRouter` are appended with a trailing slash.
 This behavior can be modified by setting the `trailing_slash` argument to `False` when instantiating the router.  For example:
 
     router = SimpleRouter(trailing_slash=False)
 
 Trailing slashes are conventional in Django, but are not used by default in some other frameworks such as Rails.  Which style you choose to use is largely a matter of preference, although some javascript frameworks may expect a particular routing style.
 
-By default the URLs created by `SimpleRouter` use regular expressions. This behavior can be modified by setting the `use_regex_path` argument to `False` when instantiating the router, in this case [path converters][path-converters-topic-reference] are used. For example:
-
-    router = SimpleRouter(use_regex_path=False)
-
-**Note**: `use_regex_path=False` only works with Django 2.x or above, since this feature was introduced in 2.0.0. See [release note][simplified-routing-release-note]
-
-
-The router will match lookup values containing any characters except slashes and period characters.  For a more restrictive (or lenient) lookup pattern, set the `lookup_value_regex` attribute on the viewset or `lookup_value_converter` if using path converters.  For example, you can limit the lookup to valid UUIDs:
-
-    class MyModelViewSet(mixins.RetrieveModelMixin, viewsets.GenericViewSet):
-        lookup_field = 'my_model_id'
-        lookup_value_regex = '[0-9a-f]{32}'
-
-    class MyPathModelViewSet(mixins.RetrieveModelMixin, viewsets.GenericViewSet):
-        lookup_field = 'my_model_uuid'
-        lookup_value_converter = 'uuid'
-
 ## DefaultRouter
 
 This router is similar to `SimpleRouter` as above, but additionally includes a default API root view, that returns a response containing hyperlinks to all the list views.  It also generates routes for optional `.json` style format suffixes.
@@ -351,5 +352,4 @@ The [`DRF-extensions` package][drf-extensions] provides [routers][drf-extensions
 [drf-extensions-customizable-endpoint-names]: https://chibisov.github.io/drf-extensions/docs/#controller-endpoint-name
 [url-namespace-docs]: https://docs.djangoproject.com/en/4.0/topics/http/urls/#url-namespaces
 [include-api-reference]: https://docs.djangoproject.com/en/4.0/ref/urls/#include
-[simplified-routing-release-note]: https://docs.djangoproject.com/en/2.0/releases/2.0/#simplified-url-routing-syntax
 [path-converters-topic-reference]: https://docs.djangoproject.com/en/2.0/topics/http/urls/#path-converters