chore(e2e): bump Cardano node to version '10.6.1'

Author: jpraynaud

mithril-test-lab/mithril-end-to-end/src/main.rs

@@ -70,7 +70,7 @@ pub struct Args {
     cardano_epoch_length: f64,
 
     /// Cardano node version, must be a valid semver version
-    #[clap(long, default_value = "10.5.1")]
+    #[clap(long, default_value = "10.6.1")]
     cardano_node_version: semver::Version,
 
     /// Epoch at which hard fork to the latest Cardano era will be made (starts with the latest era by default)