Eliminate usage of typing module and update docstrings.

Author: RohanJnr

pydis_site/apps/api/serializers.py

@@ -1,6 +1,4 @@
 """Converters from Django models to data interchange formats and back."""
-from typing import List
-
 from django.db.models.query import QuerySet
 from django.db.utils import IntegrityError
 from rest_framework.exceptions import NotFound
@@ -205,12 +203,12 @@ def to_representation(self, instance: Infraction) -> dict:
 class OffTopicChannelNameListSerializer(ListSerializer):
     """Custom ListSerializer to override to_representation() when list views are triggered."""
 
-    def to_representation(self, objects: List[OffTopicChannelName]) -> List[str]:
+    def to_representation(self, objects: list[OffTopicChannelName]) -> list[str]:
         """
-        Return a list representing a list of `OffTopicChannelName`.
+        Return a list with all `OffTopicChannelName`s in the database.
 
-        This only returns the name of the off topic channel name. As the model
-        only has a single attribute, it is unnecessary to create a nested dictionary.
+        This returns the list of off topic channel names. We want to only return
+        the name attribute, hence it is unnecessary to create a nested dictionary.
         Additionally, this allows off topic channel name routes to simply return an
         array of names instead of objects, saving on bandwidth.
         """