docs: Tidy up the English in the testing tutorial

Tweak a few sentences noticed when reading this.

BUG=none
BRANCH=none
TEST=none

Change-Id: I0a072c83402bc551a6bbdb7cd7c55fc3505784b2
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77096
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77464
Reviewed-by: Martin L Roth <gaumless@gmail.com>
Reviewed-by: Patrick Georgi <patrick@coreboot.org>
Tested-by: Patrick Georgi <patrick@coreboot.org>

0 files changed, 0 insertions, 0 deletions