Remove undefined acronyms from requirements + fix broken links

[albeanth]

What is the change?

When SQA documentation is generated, these acronyms (though commonly known internally and by SMEs) are technically undefined. We shouldn't have that.

Also sneaking in a couple of broken links.

Why is the change being made?

SQA efforts.

---

Checklist

• This PR has only one purpose or idea. It did at one point. See above.
• Tests have been added/updated to verify that the new/changed code works.

• The code style follows good practices.
• The commit message(s) follow good practices.

• The release notes (location doc/release/0.X.rst) are up-to-date with any important changes.
• The documentation is still up-to-date in the doc folder.
• If any requirements were affected, mention it in the release notes.
• The dependencies are still up-to-date in pyproject.toml.

[john-science]

Third time's a charm!