docs/node/mainnet: Bump Key Manager to 0.6.0

Author: kostko

docs/node/mainnet/README.md

@@ -64,7 +64,6 @@ This section contains parameters for various ParaTimes known to be deployed on t
   * `000000000000000000000000000000000000000000000000f80306c9858e7279`
 * Runtime bundle version:
   * [0.10.3](https://github.com/oasisprotocol/sapphire-paratime/releases/tag/v0.10.3)
-  * [0.9.2](https://github.com/oasisprotocol/sapphire-paratime/releases/tag/v0.9.2)
 * Oasis Web3 Gateway version:
   * [5.2.0](https://github.com/oasisprotocol/oasis-web3-gateway/releases/tag/v5.2.0)
 
@@ -76,7 +75,6 @@ This section contains parameters for various ParaTimes known to be deployed on t
   * `000000000000000000000000000000000000000000000000e199119c992377cb`
 * Runtime bundle version:
   * [3.3.3](https://github.com/oasisprotocol/cipher-paratime/releases/tag/v3.3.3)
-  * [3.2.2](https://github.com/oasisprotocol/cipher-paratime/releases/tag/v3.2.2)
 
 ### Emerald
 
@@ -103,4 +101,4 @@ the public Web3 endpoint.
 * Runtime identifier:
   * `4000000000000000000000000000000000000000000000008c5ea5e49b4bc9ac`
 * Runtime bundle version:
-  * [0.5.0](https://github.com/oasisprotocol/keymanager-paratime/releases/tag/v0.5.0)
+  * [0.6.0](https://github.com/oasisprotocol/keymanager-paratime/releases/tag/v0.6.0)