Link to concore-editor is expired.

The link (https://controlcore-project.github.io/DHGWorkflow) to open concore editor on running ./editgraph seems to be expired or unavailable.

<img width="1915" height="1010" alt="Image" src="https://github.com/user-attachments/assets/755431c3-eebb-402a-928f-e604a1640a76" />