fix(AppConfig): Add external JWT private key to sensitive keys

Signed-off-by: provokateurin <[email protected]>

Author: provokateurin

lib/private/AppConfig.php

@@ -1432,6 +1432,7 @@ private function getSensitiveKeys(string $app): array {
 			],
 			'external' => [
 				'/^sites$/',
+				'/^jwt_token_privkey_(.*)$/',
 			],
 			'integration_discourse' => [
 				'/^private_key$/',