Update scopes.md

[tpinfold]

#694

Thank you for taking the time to help the darktable documentation!

Please include a link to the Pull Request that you are documenting

darktable-org/darktable#17838

Tell us a little bit about this pull request

Have just implemented developers description and confirmed it functions as described.

[kofa73]

In other places in the docs, individual controls (like exposure and black level here) are highlighted using italics.
Also, why remove the link to the exposure module's docs?

[tpinfold]

Thanks for looking at this @kofa73. This is my first attempt at learning how to help with documentation. I just copied what was already in the user manual and added the bare minimum to update the documentation to be correct. I didn't mean to remove any links or change the use of italics, but I see the inconsistency in the use of italics in the document I copied from. Can you advice how I retain the link? I am still on my L plates here.

[elstoc]

The site uses markdown format, which is pretty simple, and the same as github uses for its comments. Github provides a guide (here) or there are various "cheat sheets" available (for example here)

[tpinfold]

Should I rewrite my correction or is this close enough to be edited and used?

[kofa73]

Just restore the original text:

Suggested change

	The histogram, waveform, and RGB parade scopes can be used to directly alter the exposure and black level of the exposure module.
	The histogram, waveform, and RGB parade scopes can be used to directly alter the _exposure_ and _black level_ of the [_exposure_](../../processing-modules/exposure.md) module.

[elstoc]

If this PR is a one-off I don't mind making edits when I get around to merging, but if you intend to submit more pull requests in the future it would be good to learn the process for making changes.