doc: fix oa version

Author: jmoreira-valory

docs/index.md

@@ -19,7 +19,7 @@ In order to run a local demo based on the SMPKit:
     mkdir your_workspace && cd your_workspace
     touch Pipfile && pipenv --python 3.10 && pipenv shell
 
-    pipenv install open-autonomy[all]==0.12.1.post4
+    pipenv install open-autonomy[all]==0.14.6
     autonomy init --remote --ipfs --reset --author=your_name
     ```