Update Workflow FAIRification tutorial

[clsiguret]

Idea to improve Annotate, prepare tests and publish Galaxy workflows in workflow registries tutorial :

• Mention that test data can be deposited elsewhere than Zenodo: The tutorial currently focuses on Zenodo for test data sharing, but it would be helpful to mention (e.g. as a comment or tip) that other repositories such as Figshare or institutional platforms are also acceptable.
• Remove reference to mapping workflow: The tutorial refers to a mapping workflow that is no longer used. This reference can be removed to avoid confusion.
• Add alternative workflow publication paths (for non-IWC users): Currently, the tutorial guides users through publishing via IWC, which then syncs automatically with WorkflowHub and Dockstore. However, for users less comfortable with Git and command-line tools, it could be useful to mention that workflows can also be submitted directly to WorkflowHub or Dockstore manually.
  → Suggest adding a Choose Your Own Tutorial section to offer both options (automated via IWC and manual upload).

Thanks for considering! 😊

[clsiguret]

The Issue is here @bebatut 🎉