Link to the index page (#15693)

docs/connector-development/config-based/overview.md

@@ -3,7 +3,7 @@
 :warning: This framework is in alpha stage. Support is not in production and is available only to select users. :warning:
 
 The goal of this document is to give enough technical specifics to understand how config-based connectors work.
-When you're ready to start building a connector, you can start with [the tutorial](./tutorial/0-getting-started.md) or dive into the [reference documentation](https://airbyte-cdk.readthedocs.io/en/latest/api/airbyte_cdk.sources.declarative.html)
+When you're ready to start building a connector, you can start with [the tutorial](./tutorial/0-getting-started.md), or dive into [more detailed documentation](./index.md).
 
 ## Overview