📝 Update source examples and docs from Python 3.9 to 3.10 (#14900)

docs_src/response_change_status_code/tutorial001_py310.py

@@ -0,0 +1,13 @@
+from fastapi import FastAPI, Response, status
+
+app = FastAPI()
+
+tasks = {"foo": "Listen to the Bar Fighters"}
+
+
+@app.put("/get-or-create-task/{task_id}", status_code=200)
+def get_or_create_task(task_id: str, response: Response):
+    if task_id not in tasks:
+        tasks[task_id] = "This didn't exist before"
+        response.status_code = status.HTTP_201_CREATED
+    return tasks[task_id]