fix: add mock to isrtl

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

src/tests/utils/timePresets.spec.ts

@@ -9,6 +9,7 @@ import { getTimePresetRange, getTimePresets } from '../../utils/timePresets.js'
 
 vi.mock('@nextcloud/l10n', () => ({
 	t: (_app: string, text: string) => text,
+	isRTL: vi.fn(() => false),
 }))
 
 describe('getTimePresets', () => {