message: fix: chart datasource explore URL showing datasource name for druid
diff: @@ -133,7 +133,7 @@ class Slice(
  if self.table:
  return self.table.explore_url
  datasource = self.datasource
  - return datasource.name if datasource else None
  + return datasource.explore_url if datasource else None
  def datasource_name_text(self) -> Optional[str]:
  # pylint: disable=no-member
  