* added check to RateThrottle.ChangeRate() in rate.go to prevent a divide by 0 error when the rate is set to 0. Ref: issue 696: https://github.com/ffuf/ffuf/issues/696
* added name to contributors.md and small change description to changelog.md as requested in PR doc
* Update CONTRIBUTORS.md
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Co-authored-by: Joona Hoikkala <5235109+joohoi@users.noreply.github.com>