Fix Rake/Require offense

What does this MR do and why?

This MR aims to solve the issue #391459 (closed)

Fixes Rake/Require offense in webdrivers.rake task

Screenshots or screen recordings

How to set up and validate locally

bundle exec rubocop qa/tasks/webdrivers.rake
Inspecting 1 file
.

1 file inspected, no offenses detected

MR acceptance checklist

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