Update docs/README.md with link to new Makefile

The old dev-setup.md and dao-setup.md docs have been marked as
deprecated for now and may be removed after we've gotten sufficient
feedback on the Makefile-based approach.

docs/README.md

@@ -3,8 +3,9 @@
  - [CONTRIBUTING.md](../CONTRIBUTING.md): Understand Bisq's contribution and compensation guidelines
  - [build.md](build.md): Build and run Bisq at the command line
  - [idea-import.md](idea-import.md): Import Bisq sources into IntelliJ IDEA
- - [dev-setup.md](dev-setup.md): Set up a self-contained local Bisq network on Bitcoin regtest
- - [dao-setup.md](dao-setup.md): Set up a complete Bisq DAO development environment
+ - [Makefile](../Makefile): (new) Set up a self-contained local Bisq network on Bitcoin regtest
+ - [dev-setup.md](dev-setup.md): (deprecated) Set up a self-contained local Bisq network on Bitcoin regtest
+ - [dao-setup.md](dao-setup.md): (deprecated) Set up a complete Bisq DAO development environment
  - [testing.md](testing.md): Learn about the Bisq testing process and how you can contribute.
 
 Looking for user-facing documentation? See https://docs.bisq.network.