Update Auth0 sponsorship link (#2037)

Hey

We recently launched a new page specifically geared towards developers on auth0.com.
Can we change the link in the sponsorship message?

Thanks again for your open-source work!

Sam

README.md

@@ -19,7 +19,7 @@ For version `0.5.*` See the [WIKI](https://github.com/tymondesigns/jwt-auth/wiki
 
 ### Supported by Auth0 <span><img src="https://user-images.githubusercontent.com/1801923/31792116-d4fca9ec-b512-11e7-92eb-56e8d3df8e70.png" height="28" align="top"></span>
 
-If you want to easily add secure authentication to Laravel apps, feel free to check out Auth0's SDK and free plan at [auth0.com/overview](https://auth0.com/overview?utm_source=GHsponsor&utm_medium=GHsponsor&utm_campaign=jwt-auth&utm_content=auth)
+If you want to easily add secure authentication to Laravel apps, feel free to check out Auth0's SDK and free plan at [auth0.com/developers](https://auth0.com/developers?utm_source=GHsponsor&utm_medium=GHsponsor&utm_campaign=jwt-auth&utm_content=auth)
 
 ## Security