Update lib/private/Files/FilenameValidator.php

Co-authored-by: Côme Chilliet <91878298+come-nc@users.noreply.github.com>
Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>

lib/private/Files/FilenameValidator.php

@@ -125,7 +125,7 @@ public function getForbiddenCharacters(): array {
 			// Get admin defined invalid characters
 			$additionalChars = $this->config->getSystemValue('forbidden_filename_characters', []);
 			if (!is_array($additionalChars)) {
-				$this->logger->error('Invalid system config value for "forbidden_chars" is ignored.');
+				$this->logger->error('Invalid system config value for "forbidden_filename_characters" is ignored.');
 				$additionalChars = [];
 			}
 			$forbiddenCharacters = array_merge($forbiddenCharacters, $additionalChars);