Fix offshore wind capacity factors in PyPSA-China

[1june123]

Problem Description

The current offshore wind capacity factors in PyPSA-China are inaccurate. This can affect the optimization results and lead to unrealistic system planning.

Tasks

• Update the offshore wind capacity factors based on recent datasets.
• Verify the new data is correctly incorporated into the model.
• Test the model with updated capacity factors to evaluate its impact on system outputs.