Fix: Update Scaleway deployment and Hugo config

- Use correct environment variables for Scaleway deployment
- Install Scaleway CLI to purge CDN cache
- Add deployment target for S3

hugo.yaml

@@ -1,5 +1,5 @@
 baseURL: "https://darnodo.github.io/"
-title: 🧑‍💻 Notebook 
+title: 🧑‍💻 Notebook
 theme: hextra
 
 defaultContentLanguage: fr
@@ -47,4 +47,9 @@ params:
 markup:
   goldmark:
     renderer:
-      unsafe: true
+      unsafe: true
+
+deployment:
+  targets:
+    - name: "notebook-arnodo-fr"
+      URL: "s3://notebook-arnodo-fr?endpoint=https://s3.fr-par.scw.cloud&region=fr-par"