Doc: Use consistent markup for example Point class in sqlite3 (GH-96095)

(cherry picked from commit 303ef09)

Co-authored-by: C.A.M. Gerlach <CAM.Gerlach@Gerlach.CAM>

Author: miss-islington

Doc/library/sqlite3.rst

@@ -1274,7 +1274,7 @@ registering custom adapter functions.
 Letting your object adapt itself
 """"""""""""""""""""""""""""""""
 
-Suppose we have a ``Point`` class that represents a pair of coordinates,
+Suppose we have a :class:`!Point` class that represents a pair of coordinates,
 ``x`` and ``y``, in a Cartesian coordinate system.
 The coordinate pair will be stored as a text string in the database,
 using a semicolon to separate the coordinates.
@@ -1305,11 +1305,11 @@ values.
 To be able to convert *from* SQLite values *to* custom Python types,
 we use *converters*.
 
-Let's go back to the :class:`Point` class. We stored the x and y coordinates
+Let's go back to the :class:`!Point` class. We stored the x and y coordinates
 separated via semicolons as strings in SQLite.
 
 First, we'll define a converter function that accepts the string as a parameter
-and constructs a :class:`Point` object from it.
+and constructs a :class:`!Point` object from it.
 
 .. note::