Improve visibility of Kubernetes benchmark tool

## Definition of done
Improve the visibility of this page, maybe it has to be linked from most Kubernetes pages?
https://developer.konghq.com/gateway/performance/benchmarks/

## Size

- S (Small).

Start with the benchmark page at https://developer.konghq.com/gateway/performance/benchmarks/ and inspect the site's Kubernetes-related pages to identify suitable links or navigation points. Confirm the intended scope for “most Kubernetes pages” before making changes; done means the benchmark tool is visibly linked from the agreed pages.

Written by the indexing model from the issue text.