docs(fix): dead links to example local-provider-project (#460)

Author: BracketJohn

docs/content/v0.6/1.getting-started/3.quick-start.md

@@ -66,8 +66,9 @@ The local provider does not require any additional steps, as it relies on an alr
 So when you call the `signIn` method, the endpoint `/api/auth/login` will be hit with the `username` and `password` you pass as a body-payload. You likely have to modify these parameters to fit to your backend - you can adjust these parameters in your `nuxt.config.ts` using the options [specified here](/nuxt-auth/v0.6/configuration/nuxt-config).
 
 Note: The backend can also be in the same Nuxt 3 application, e.g., have a look at this example in the `nuxt-auth` repository:
-- [backend-implementation](https://github.com/sidebase/nuxt-auth/v0.6/tree/main/examples/local/server/api/auth)
-- [`nuxt.config.ts` matching this implementation](https://github.com/sidebase/nuxt-auth/v0.6/tree/main/examples/local/nuxt.config.ts)
+- [full nuxt app](https://github.com/sidebase/nuxt-auth/tree/main/playground-local)
+    - its [backend](https://github.com/sidebase/nuxt-auth/tree/main/playground-local/server/api/auth)
+    - its [`nuxt.config.ts`](https://github.com/sidebase/nuxt-auth/blob/main/playground-local/nuxt.config.ts)
 
 ::alert{type="info"}
 The linked example-implementation only serves as a starting-point and is not considered to be secure.