Tweak link colors for increased contrast

[adhilto]

💡 Summary

Tweak the report link colors for increased contrast.

Motivation and context

This AAD disclaimer at the top in dark mode is the most problematic IMO. I can't even read it without highlighting it. At which point a typo ("file file") typo becomes evident which might make sense to fix with this issue as well.

The light mode visited link color might benefit from being darker for more contrast. On the left is the current color, on the right is an example with more contrast.

Same thing for the unvisited link color:

Implementation notes

The alternate colors used in the above examples (not that we need to use these specifically):

• Visited: #5b7844
• Unvisited: #006086

Acceptance criteria

• Links all have appropriate levels of contrast
• "file file" typo has been fixed