chore(tests): Adapt BackupCodeStorageTest to code changes

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

Author: come-nc

apps/twofactor_backupcodes/tests/Unit/Service/BackupCodeStorageTest.php

@@ -158,12 +158,11 @@ public function testValidateCode(): void {
 			->with('CHALLENGE', 'HASHEDVALUE', $this->anything())
 			->willReturn(true);
 		$this->mapper->expects($this->once())
-			->method('update')
-			->with($code);
+			->method('markUsedIfUnused')
+			->with($code)
+			->willReturn(1);
 
 		$this->assertTrue($this->storage->validateCode($user, 'CHALLENGE'));
-
-		$this->assertEquals(1, $code->getUsed());
 	}
 
 	public function testValidateUsedCode(): void {