Removed second instance of "the" in first sentence

[FalcoVerhagen]

There were two instances of the word "the" in the first sentence of this README

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[FalcoVerhagen]

@googlebot I signed it!

[PEConn]

Hey, thanks for this pull request!

Unfortunately this repo is mirrored from a Chromium one, so we'd need to fix the typo in that repo to fix it here.