chore: fixup light scheme link

Author: panva

docs/README.md

@@ -16,7 +16,7 @@
 <picture>
   <source media="(prefers-color-scheme: dark)" srcset="../sponsor/Auth0byOkta_dark.png">
   <source media="(prefers-color-scheme: light)" srcset="../sponsor/Auth0byOkta_light.png">
-  <img height="65" align="left" alt="Auth0 by Okta" src=".,/sponsor/Auth0byOkta_light.png">
+  <img height="65" align="left" alt="Auth0 by Okta" src="../sponsor/Auth0byOkta_light.png">
 </picture> 
 
 If you want to quickly add OpenID Connect authentication to Node.js apps, feel free to check out Auth0's Node.js SDK and free plan. [Create an Auth0 account; it's free!][sponsor-auth0]<br><br>