docs: improve "rule" definition

[toddbaert]

This wasn't really incorrect, but it was a bit tough to understand, IMO.

[gemini-code-assist]

Summary of Changes

Hello @toddbaert, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request aims to enhance the clarity of the project's documentation by refining the definition of "Rule" within the glossary. The change makes the explanation more straightforward and accessible, improving the overall readability and comprehension of key terminology.

Highlights

• Documentation Clarity: The definition of "Rule" in the glossary has been updated to be more precise and easier to understand, replacing "criteria that's used to determine which variant a particular context should be mapped to" with "criteria or logic used to determine which variant is assigned in an evaluation."

Changelog

• specification/glossary.md
  • Updated the definition of "Rule" for improved clarity.

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[gemini-code-assist]

Code Review

This pull request improves the definition of a 'rule' in the glossary for better clarity. The new definition is more aligned with the terminology used elsewhere in the specification. I've suggested a minor wording tweak to make the definition even more concise and use a more active voice.