Correct typo in api-load-testing.md

[al3xandrugroza]

In the context of your quoted sentence-"To avoid skewed latency results, ensure that the location of the load generator is constant across test tuns, and avoid running the tests from locations that are too close to the SUT"- most probably the word "tuns" is a typographical error and should actually be "runs" (as in "test runs")

What?

Correct typo: "tuns" -> "runs"

Checklist

• I have used a meaningful title for the PR.
• I have described the changes I've made in the "What?" section above.
• I have performed a self-review of my changes.
• I have reflected my changes in the docs/sources/k6/v{most_recent_release} folder of the documentation.

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[heitortsergent]

Thanks for opening the PR and catching that typo @al3xandrugroza!

Could you please also update the same file in the next folder? https://github.com/grafana/k6-docs/blob/main/docs/sources/k6/next/testing-guides/api-load-testing.md

That ensures the typo is fixed in the next versions as well. 🤓