Fix Tutorial listing on Learn page

[g4brielvs]

This PR includes a small contribution renaming and fixing tutorials names on the Learn page.

• Close https://github.com/pyOpenSci/python-package-guide/issues/299

[lwasser]

hey there @g4brielvs - welcome to pyOpenSci and thank you for the pr.👋🏻 How did you find us?

These are great edits. I'll merge now!

[lwasser]

@all-contributors please add @g4brielvs for code, review

[allcontributors[bot]]

@lwasser

I've put up a pull request to add @g4brielvs! :tada: