fix dead link in adr-030-authz-module.md

ref: #25090

Author: cypherpepe

docs/architecture/adr-030-authz-module.md

@@ -25,7 +25,7 @@ The concrete use cases which motivated this module include:
 delegated stake
 * "sub-keys" functionality, as originally proposed in [\#4480](https://github.com/cosmos/cosmos-sdk/issues/4480) which
 is a term used to describe the functionality provided by this module together with
-the `fee_grant` module from [ADR 029](./adr-029-fee-grant-module.md) and the [group module](https://github.com/cosmos/cosmos-sdk/tree/main/x/group).
+the `fee_grant` module from [ADR 029](./adr-029-fee-grant-module.md) and the [group module](https://github.com/cosmos/cosmos-sdk/tree/main/contrib/x/group).
 
 The "sub-keys" functionality roughly refers to the ability for one account to grant some subset of its capabilities to
 other accounts with possibly less robust, but easier to use security measures. For instance, a master account representing