Update README.md

[DizzyG123]

Added to music theory pages; trying to find out how to properly do a pull request

[levinericzimmermann]

Thanks @kvitor123.

Unfortunately there is a space too much between the square bracket and the round bracket, it should be [Music Theory for Musicians](https://www.music-theory-for-musicians.com/) instead of [Music Theory for Musicians] (https://www.music-theory-for-musicians.com/). With this space, the markdown code isn't correctly rendered as a link.

Once this is corrected, this looks fine to me.

[DizzyG123]

@levinericzimmermann Fixed the spacing. Can the code be rendered as a link now? Let me know if it doesn't work still.

[levinericzimmermann]

Thanks @kvitor123, it works now! Maybe just please squash your commits into one, as this is semantically only 1 change ("Add Music Theory for Musicians").

[DizzyG123]

Hey there,

Thanks for letting me know. If this is good to go, does someone review it and approve whether or not it gets added in the main page? I was looking back at it and noticed that the website wasn't there. It could be because I'm not looking in the right place for the change, but just wanted to ask if I could know for future commits.

[noteflakes]

Hi, please put the new entry in the correct place in order to respect alphabetic ordering.

[DizzyG123]

Okay @noteflakes I can look into it today to put it in the correct place. Thanks for letting me know.