Update README.md

handson-irods/README.md

-# Prise en main de iRODS
+# Prise en main de iRODS et des `iCommand`
 
 contact@prabi.fr
 
@@ -119,6 +119,22 @@ git clone https://github.com/sigau/easy_irods_commands
 cd easy_irods_commands
 ```
 
+```mermaid
+graph TB
+
+  SubGraph1 --> SubGraph1Flow
+  subgraph "SubGraph 1 Flow"
+  SubGraph1Flow(SubNode 1)
+  SubGraph1Flow -- Choice1 --> DoChoice1
+  SubGraph1Flow -- Choice2 --> DoChoice2
+  end
+
+  subgraph "Main Graph"
+  Node1[Node 1] --> Node2[Node 2]
+  Node2 --> SubGraph1[Jump to SubGraph1]
+  SubGraph1 --> FinalThing[Final Thing]
+end
+
 # iRODS du ccin2p3
 Vous avez également accès au système iRODS du CCIN2P3.