fix: add mock to isrtl

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

Author: vitormattos

src/tests/views/FilesList/FileListFilter/FileListFilter.spec.ts

@@ -12,6 +12,7 @@ import FileListFilter from '../../../../views/FilesList/FileListFilter/FileListF
 
 vi.mock('@nextcloud/l10n', () => ({
 	t: vi.fn((_app: string, text: string) => text),
+	isRTL: vi.fn(() => false),
 }))
 
 vi.mock('@nextcloud/logger', () => ({