Fix typo on documentation link (#56)

The old link information was showing `authentication-oauth1` when it should be `authentication-jwt`

packages/authentication-jwt/README.md

@@ -40,7 +40,7 @@ app.service('authentication').hooks({
 
 ## Documentation
 
-Please refer to the [@feathersjs/authentication-oauth1 documentation](https://docs.feathersjs.com/api/authentication/jwt.html) for more details.
+Please refer to the [@feathersjs/authentication-jwt documentation](https://docs.feathersjs.com/api/authentication/jwt.html) for more details.
 
 
 ## License