Nim dec dsa docs

[nimithajalal]

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[hollyschinsky]

It might be good to highlight this new section in a block at the top or make it more obvious/noticeable at least in the middle (like maybe an AnnouncementBlock or TitleBlock, though I realize this will change when we move to EDS, but we can look for something similar). I think we should link to the publisher profile step in the distribution page from there as well. A minor thing -- European Union(EU) just needs a space before the (EU).

Please also add the change to the changelog with a link to it, and probably should emphasize in an alert or something to make sure people notice it.