message: style(utils): fix documentation link
  This is a squash merge of typegoose/typegoose#417
diff: @@ -505,7 +505,7 @@ export function warnMixed(target: any, key: string): void | never {
  switch (modelOptions.options?.allowMixed) {
  default:
  case Severity.WARN:
  - logger.warn('Setting "Mixed" for property "%s.%s"\nLook here for how to disable this message: https://typegoose.github.io/typegoose/docs/api/decorators/modelOptions/#allowmixed', name, key);
  + logger.warn('Setting "Mixed" for property "%s.%s"\nLook here for how to disable this message: https://typegoose.github.io/typegoose/docs/api/decorators/model-options/#allowmixed', name, key);
  break;
  case Severity.ALLOW:
  