Add cursor shape indicator to vi mode changelog

Author: joryeugene

changelog.rst

@@ -4,6 +4,9 @@ Upcoming (TBD)
 Features:
 ---------
 * Add support for `\\T` prompt escape sequence to display transaction status (similar to psql's `%x`).
+* Add cursor shape support for vi mode. When ``vi = True``, the terminal cursor now
+  reflects the current editing mode: beam in INSERT, block in NORMAL, underline in REPLACE.
+  Uses prompt_toolkit's ``ModalCursorShapeConfig``.
 
 4.4.0 (2025-12-24)
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