chore: update default devnet and e2e test Cardano node version to '9.1.0'

Author: jpraynaud

mithril-test-lab/mithril-devnet/mkfiles/mkfiles-init.sh

@@ -9,7 +9,7 @@ esac
 
 # Cardano node version
 if [ -z "${CARDANO_NODE_VERSION}" ]; then 
-  CARDANO_NODE_VERSION="9.0.0"
+  CARDANO_NODE_VERSION="9.1.0"
 fi
 if [ -z "${CARDANO_NODE_VERSION_RELEASE}" ]; then 
   CARDANO_NODE_VERSION_RELEASE=$(echo ${CARDANO_NODE_VERSION} | cut -d'-' -f1)

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

@@ -57,7 +57,7 @@ pub struct Args {
     cardano_epoch_length: f64,
 
     /// Cardano node version
-    #[clap(long, default_value = "9.0.0")]
+    #[clap(long, default_value = "9.1.0")]
     cardano_node_version: String,
 
     /// Epoch at which hard fork to the latest Cardano era will be made (starts with the latest era by default)