fixup! feat(devmanual): Add \OCP\DB\IResult::fetch deprecation

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

Author: ChristophWurst

developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_28.rst

@@ -71,8 +71,8 @@ Changed APIs
 Deprecated APIs
 ^^^^^^^^^^^^^^^
 
-* ``\OCP\DB\IResult::fetch``: use the new ``fetchAssociative``, ``fetchNumeric`` and ``fetchOne`` instead. If you called ``fetch`` without arguments, ``fetchAssociative`` is the direct replacement.
-* ``\OCP\DB\IResult::fetchAll``: use the new ``fetchAllAssociative``, ``fetchAllNumeric`` and ``fetchOne`` instead. If you called ``fetchAll`` without arguments, ``fetchAllAssociative`` is the direct replacement.
+* ``\OCP\DB\IResult::fetch``: use the new ``fetchAssociative``, ``fetchNumeric`` and ``fetchOne`` instead. If you called ``fetch`` without arguments, ``fetchAssociative`` is the direct replacement. Beware that the new methods throw a different exception.
+* ``\OCP\DB\IResult::fetchAll``: use the new ``fetchAllAssociative``, ``fetchAllNumeric`` and ``fetchOne`` instead. If you called ``fetchAll`` without arguments, ``fetchAllAssociative`` is the direct replacement. Beware that the new methods throw a different exception.
 * ``\OCP\Preview\BeforePreviewFetchedEvent`` passing ``null`` for ``width, height, crop or mode`` is deprecated. Starting with Nextcloud 31 they are mandatory.
 
 Removed APIs