📝 Fix typo in docs with examples for Python 3.10 instead of 3.9 (#5545)

Co-authored-by: Feliciss <system@Felicisss-MacBook-Air.local>
Co-authored-by: Sebastián Ramírez <tiangolo@gmail.com>

docs/en/docs/tutorial/request-files.md

@@ -124,7 +124,7 @@ You can make a file optional by using standard type annotations and setting a de
     {!> ../../../docs_src/request_files/tutorial001_02.py!}
     ```
 
-=== "Python 3.9 and above"
+=== "Python 3.10 and above"
 
     ```Python hl_lines="7  14"
     {!> ../../../docs_src/request_files/tutorial001_02_py310.py!}