text: Title: [DOC] Wrong default value for `return_metadata` in `load_forecasting`
  Body: ### Describe the issue linked to the documentation
  
  The parameter `return_metadata` in `aeon.datasets.load_forecasting` is set to False, but in the docstring it is set to True 
  
  ### Suggest a potential alternative/fix
  
  it should be False in the docstring