added Database section to README.md

Signed-off-by: muraca <mmuraca247@gmail.com>

README.md

@@ -42,6 +42,10 @@ The best way to explore this runtime is by browsing its [code](./tuxedo-template
 
 There is an example node built with the Tuxedo template runtime. Because Tuxedo is primarily a runtime development framework, there is not much interesting or unique to Tuxedo to see in this crate. It is mostly a copy from the popular [Substrate node template](https://github.com/substrate-developer-hub/substrate-node-template/tree/main/node).
 
+#### Database
+
+PR [#136](https://github.com/Off-Narrative-Labs/Tuxedo/pull/136) removed RocksDB for ParityDB. This choice is unopinionated, it was made simply because RocksDB takes longer time to compile and adds unnecessary dependencies for our current use case. Developers are free to use any database they want.
+
 ### Wallet
 
 The repo contains a CLI cryptocurrency wallet that works with the template node in the `wallet` directory.