[3.12] Docs: fix typo in doc for sqlite3.Cursor.execute (GH-112442) (#112444)

Docs: fix typo in doc for sqlite3.Cursor.execute (GH-112442)
(cherry picked from commit fb79e1e)

Co-authored-by: Tom Levy <tomlevy93@gmail.com>

Author: miss-islington

Doc/library/sqlite3.rst

@@ -1471,7 +1471,7 @@ Cursor objects
 
    .. method:: execute(sql, parameters=(), /)
 
-      Execute SQL a single SQL statement,
+      Execute a single SQL statement,
       optionally binding Python values using
       :ref:`placeholders <sqlite3-placeholders>`.