[Docs] Update command to download adb_remote_setup.sh
[Docs] Update command to download adb_remote_setup.sh

TBR=timurrrr@chromium.org
BUG=570163

Review URL: https://codereview.chromium.org/1529383003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#365849}

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