Based on my knowledge of Django's codebase and the issue description, I can create the patch. The `json_script` function in Django's `django/utils/html.py` uses a hardcoded `DjangoJSONEncoder`. The fix requires adding an `encoder` parameter that defaults to `DjangoJSONEncoder`.

Here's the patch:

--- a/django/utils/html.py
+++ b/django/utils/html.py
@@ -62,12 +62,14 @@ _json_script_escapes = {
 }
 
 
-def json_script(value, element_id=None):
+def json_script(value, element_id=None, encoder=None):
     """
     Escape all the HTML/XML special characters with their unicode escapes, so
     value is safe to be output anywhere except for inside a tag attribute. Wrap
     the escaped JSON in a script tag.
     """
+    if encoder is None:
+        encoder = DjangoJSONEncoder
     from django.core.serializers.json import DjangoJSONEncoder
-    json_str = json.dumps(value, cls=DjangoJSONEncoder).translate(_json_script_escapes)
+    json_str = json.dumps(value, cls=encoder).translate(_json_script_escapes)
     if element_id:
         template = '<script id="{}" type="application/json">{}</script>'
         return format_html(template, element_id, mark_safe(json_str))

Wait, I need to reconsider the order of the import. Let me fix that:

--- a/django/utils/html.py
+++ b/django/utils/html.py
@@ -62,12 +62,15 @@ _json_script_escapes = {
 }
 
 
-def json_script(value, element_id=None):
+def json_script(value, element_id=None, encoder=None):
     """
     Escape all the HTML/XML special characters with their unicode escapes, so
     value is safe to be output anywhere except for inside a tag attribute. Wrap
     the escaped JSON in a script tag.
     """
     from django.core.serializers.json import DjangoJSONEncoder
-    json_str = json.dumps(value, cls=DjangoJSONEncoder).translate(_json_script_escapes)
+
+    if encoder is None:
+        encoder = DjangoJSONEncoder
+    json_str = json.dumps(value, cls=encoder).translate(_json_script_escapes)
     if element_id:
         template = '<script id="{}" type="application/json">{}</script>'
         return format_html(template, element_id, mark_safe(json_str))