[Typo] Update md files

[luchaoqi]

fix hyperlink error/typo

What does this PR do?

Fixes # (issue)

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[stevhliu]

Thanks for the fix! There are a couple other files with this error, would you like to also fix those in this PR?

[luchaoqi]

@stevhliu thanks! All fixed, feel free to let me know if you have any other suggestions.

[stevhliu]

Sorry I wasn't clear before, but the .md at the end needs to be removed otherwise the link won't work. The link in InstructPix2Pix should work, but if you take a look at the files here, they won't work.

[luchaoqi]

Yes, .md should be removed at the end of links