docs: Link match statement in tutorial (pythonGH-31396)

Add a link to the `match` statement from its section in the tutorial.

This should be backported to 3.10.

[Initially submitted as python#31395 but against the wrong branch. Thanks @Mariatta]

Automerge-Triggered-By: GH:Mariatta

Doc/tutorial/controlflow.rst

@@ -250,7 +250,7 @@ at a more abstract level.  The :keyword:`!pass` is silently ignored::
 :keyword:`!match` Statements
 ============================
 
-A match statement takes an expression and compares its value to successive
+A :keyword:`match` statement takes an expression and compares its value to successive
 patterns given as one or more case blocks.  This is superficially
 similar to a switch statement in C, Java or JavaScript (and many
 other languages), but it can also extract components (sequence elements or