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

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

@@ -103,15 +103,16 @@ 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: Union[str, None] = None
+q: str | None = None
 ```
 
-Or in Python 3.10 and above:
+Or in Python 3.9:
 
 ```Python
-q: str | None = None
+q: Union[str, None] = None
 ```
 
+
 For example:
 
 {* ../../docs_src/body_multiple_params/tutorial004_an_py310.py hl[28] *}