Update docs/proposals/authentication-filter.md

Co-authored-by: Saylor Berman <[email protected]>

Author: shaun-nx

docs/proposals/authentication-filter.md

@@ -1011,6 +1011,7 @@ spec:
 `require`, `tokenSource` and `propagation` are some additional fields that may be incldued in future updates to the API.
 These fields allow for more customization of how the JWT auth behaves, but aren't required for the minimal delivery of JWT Auth.
 
+Example of what implementation of these fields might look like:
 Example of what implementation of these fields might look like:
 
 ```yaml