gh-133447: Update sqlite3 What's New 3.15 entry (GH-136079)

Author: StanFromIreland

Doc/whatsnew/3.15.rst

@@ -140,8 +140,15 @@ shelve
 sqlite3
 -------
 
-* Support SQL keyword completion in the :mod:`sqlite3` command-line interface.
-  (Contributed by Long Tan in :gh:`133393`.)
+* The :ref:`command-line interface <sqlite3-cli>` has several new features:
+
+   * SQL keyword completion on <tab>.
+     (Contributed by Long Tan in :gh:`133393`.)
+
+   * Prompts, error messages, and help text are now colored.
+     This is enabled by default, see :ref:`using-on-controlling-color` for
+     details.
+     (Contributed by Stan Ulbrych and Łukasz Langa in :gh:`133461`)
 
 
 ssl