docs(readme): add dingo role (#200)

Signed-off-by: Chris Gianelloni <[email protected]>

Author: wolf31o2

README.md

@@ -11,12 +11,13 @@ using normal methods, documented under
 
 Inside this collection are several roles.
 
+- `blinklabs.cardano.adder`
 - `blinklabs.cardano.cardano_db_sync`
 - `blinklabs.cardano.cardano_node`
 - `blinklabs.cardano.cardano_node_api`
+- `blinklabs.cardano.dingo`
 - `blinklabs.cardano.kupo`
 - `blinklabs.cardano.ogmios`
-- `blinklabs.cardano.adder`
 - `blinklabs.cardano.tx_submit_api`
 
 Each role is documented independently under the roles directory.