Changing 'queries' verbiage.

[trentfowlercohere]

This PR updates the documentation for the rerank-v3.0 and rerank-v3.5 models, clarifying the context length and how the query and document are considered in the calculation.

Changes

• The order of the model versions is reversed, now listing rerank-v3.5 first.
• The description now specifies that the model takes both the query and the document into account when calculating against the context length limit.
• It is now stated that the query can account for up to half of the full context length, with the other half reserved for the document(s).

[github-actions]

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