docs: rephrased readline support wording

Signed-off-by: Kuang Yu Heng <[email protected]>

Author: Yuheng3107

Doc/library/readline.rst

@@ -8,7 +8,7 @@
 .. sectionauthor:: Skip Montanaro <[email protected]>
 
 .. note::
-   The new REPL introduced in version 3.13 no longer supports readline.
+   The new :term:`REPL` introduced in version 3.13 doesn't support readline.
    However, readline can still be used by setting the :envvar:`PYTHON_BASIC_REPL` environment variable.
 
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