Add reference to Click PRs:

pallets/click#2516
pallets/click#2517

Author: kdeldycke

click_extra/parameters.py

@@ -179,7 +179,9 @@ def get_help_default(option: click.Option, ctx: click.Context) -> str | None:
                     ~/(...)/multiple_envvars.py/*.{toml,yaml,yml,json,ini,xml}
 
         .. todo::
-            Contribute this code upstream to Click.
+            A better solution has been proposed upstream to Click:
+            - https://github.com/pallets/click/issues/2516
+            - https://github.com/pallets/click/pull/2517
         """
         # Temporarily enable resilient parsing to avoid type casting
         # failing for the default. Might be possible to extend this to