docs: update Artifact Hub publishing tutorial

[Bhumikagarggg]

Notes for Reviewers

This PR fixes #

Signed commits

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[gemini-code-assist]

Code Review

This pull request updates the Artifact Hub publishing tutorial to reflect recent UI changes in Kanvas, clarifying the prerequisites, step-by-step export process, and file extraction steps. The review feedback suggests improving consistency and preventing potential routing issues by using lowercase for the alias path and the Artifact Hub domain name, as well as adding a missing trailing period to one of the list items.

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[banana-three-join]

"Prepare your Artifact Hub repo" and "Verify Repository in Artifact Hub" Sections should have accompanying imagery to help with ease the assimilation of the tutorials.

The type of header being utilized for each individual step is currently reserved for the changes in section. This warrants a change in styling for each individual step header.

[Bhumikagarggg]

"Prepare your Artifact Hub repo" and "Verify Repository in Artifact Hub" Sections should have accompanying imagery to help with ease the assimilation of the tutorials.

The type of header being utilized for each individual step is currently reserved for the changes in section. This warrants a change in styling for each individual step header.

Thanks for the feedback. I’ve added accompanying images to both the “Prepare your Artifact Hub repo” and “Verify Repository in Artifact Hub” sections to improve clarity and ease of following the tutorial. I’ve also updated the step header styling to better align with the documentation conventions.

[banana-three-join]

Imagery is also need for "Push Design to Artifact Hub repository" since the second step states "locate and extract the second archive" so an image showcasing which one is the second one would be helpful for the user following the tutorial.

Also, the heading in the steps is incorrect. Either the first 4 steps change in heading or the other 3 remaining items in the ToC should be numerated.

[Bhumikagarggg]

Imagery is also need for "Push Design to Artifact Hub repository" since the second step states "locate and extract the second archive" so an image showcasing which one is the second one would be helpful for the user following the tutorial.

Also, the heading in the steps is incorrect. Either the first 4 steps change in heading or the other 3 remaining items in the ToC should be numerated.

The wording has been updated to explicitly refer to the .tar.gz archive instead of the "second archive", as the ordering of extracted files may vary across systems. The step headings have also been made consistent by numbering the remaining sections as steps 6, 7, and 8.