docs(tutorials/blog): update links to MDN docs for Request and Request.formData

[pmbanugo]

Update links to the MDN docs because the current links produce redirects and I end up in a duckduckgo search page. The video below shows how to reproduce it.

Screen.Recording.2022-12-04.at.23.11.53.mov

My change adds an info section to make it readable and also open the links in a new page without too many redirects.

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[machour]

Thank you for your submission.

Can you keep the markdown format and substitute old urls with new ones?

[pmbanugo]

@machour I've changed it.

[machour]

@pmbanugo As requested above, you still need to update the references here :

-In HTML an input's `name` attribute is sent over the network and available by the same name on the request's `formData`. Oh, and don't forget, the `request` and `formData` objects are both straight out of the web specification. So if you want to learn more about either of them, head over to MDN! [mdn.io/Request][mdn-io-request] [mdn.io/Request.formData][mdn-io-request-form-data].
+In HTML an input's `name` attribute is sent over the network and available by the same name on the request's `formData`. Oh, and don't forget, the `request` and `formData` objects are both straight out of the web specification. So if you want to learn more about either of them, head over to MDN! [Request][mdn-request] [Request.formData][mdn-request-form-data].

[machour]

Thank you!