docs(tutorial): add support for Python 3.11 (aws-powertools#2860)

Author: leandrodamascena

docs/tutorial/index.md

@@ -20,11 +20,11 @@ Let's clone our sample project before we add one feature at a time.
     Bootstrap directly via SAM CLI:
 
     ```shell
-    sam init --app-template hello-world-powertools-python --name sam-app --package-type Zip --runtime python3.10 --no-tracing
+    sam init --app-template hello-world-powertools-python --name sam-app --package-type Zip --runtime python3.11 --no-tracing
     ```
 
 ```bash title="Use SAM CLI to initialize the sample project"
-sam init --runtime python3.10 --dependency-manager pip --app-template hello-world --name powertools-quickstart
+sam init --runtime python3.11 --dependency-manager pip --app-template hello-world --name powertools-quickstart
 ```
 
 ### Project structure