Show code example with new syntax first in docs/tutorial/body-multiple-params.md

docs/en/docs/tutorial/body-multiple-params.md

@@ -102,15 +102,16 @@ Of course, you can also declare additional query parameters whenever you need, a
 
 As, by default, singular values are interpreted as query parameters, you don't have to explicitly add a `Query`, you can just do:
 
+```Python
+q: str | None = None
+```
+
+Or in Python 3.9:
+
 ```Python
 q: Union[str, None] = None
 ```
 
-Or in Python 3.10 and above:
-
-```Python
-q: str | None = None
-```
 
 For example: