fix(OCC): Don't throw in the repair step for phone validation

Signed-off-by: Joas Schilling <coding@schilljs.com>

lib/private/Repair/NC21/ValidatePhoneNumber.php

@@ -55,7 +55,8 @@ class ValidatePhoneNumber implements IRepairStep {
 
 	public function run(IOutput $output): void {
 		if ($this->config->getSystemValueString('default_phone_region', '') === '') {
-			throw new \Exception('Can not validate phone numbers without `default_phone_region` being set in the config file');
+			$output->warning('Can not validate phone numbers without `default_phone_region` being set in the config file');
+			return;
 		}
 
 		$numUpdated = 0;