bpo-45335: Add note to `sqlite3` docs about "timestamp" converter (GH-29200) (GH-29319)

(cherry picked from commit 3877fc02f7a8801ba5ce0e94b6075b3fdd9778d0)

Co-authored-by: Ian Fisher <ian@iafisher.com>
diff --git a/Doc/library/sqlite3.rst b/Doc/library/sqlite3.rst
index dc9aeb2..16d2c2e 100644
--- a/Doc/library/sqlite3.rst
+++ b/Doc/library/sqlite3.rst
@@ -1072,6 +1072,12 @@
 numbers, its value will be truncated to microsecond precision by the
 timestamp converter.
 
+.. note::
+
+   The default "timestamp" converter ignores UTC offsets in the database and
+   always returns a naive :class:`datetime.datetime` object. To preserve UTC
+   offsets in timestamps, either leave converters disabled, or register an
+   offset-aware converter with :func:`register_converter`.
 
 .. _sqlite3-controlling-transactions: