Fix Authorization header string

The previous auth header was for an event in which the tag is `url` instead of `u` so it was not matching the event provided as an example

Author: dcadenas

98.md

@@ -55,7 +55,8 @@ Using the `Authorization` HTTP header, the `kind 27235` event MUST be `base64` e
 
 Example HTTP Authorization header:
 ```
-Authorization: Nostr 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
+Authorization: Nostr 
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
 ```
 
 ## Reference Implementations