message: add comment about hardcoded default target in fake-releases
diff: @@ -325,6 +325,10 @@ impl<'a> FakeRelease<'a> {
  if let Some(markdown) = self.readme {
  fs::write(crate_dir.join("README.md"), markdown)?;
  }
  +
  + // Many tests rely on the default-target being linux, so it should not
  + // be set to docsrs_metadata::HOST_TARGET, because then tests fail on all
  + // non-linux platforms.
  let default_target = self.default_target.unwrap_or("x86_64-unknown-linux-gnu");
  let release_id = crate::db::add_package_into_database(
  &mut db.conn(),
  