gitlab: Fix yaml error
gitlab: Fix yaml error

crrev/c/3173097 broke the yaml file. Quote the "SF:" text to avoid yaml
parser issues.

BUG=None
TEST=Used the CI lint tool: https://gitlab.com/zephyr-ec/ec/-/ci/lint
BRANCH=None

Signed-off-by: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@google.com>
Change-Id: I53e1cbee7bb73f31f205e55718367ee3bebe2bc8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3188642
Tested-by: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@chromium.org>
Auto-Submit: Jeremy Bettis <4df7b5147fee087dca33c181f288ee7dbf56e022@chromium.org>
Commit-Queue: Jack Rosenthal <d3f605bef1867f59845d4ce6e4f83b8dc9e4e0ae@chromium.org>
Reviewed-by: Jack Rosenthal <d3f605bef1867f59845d4ce6e4f83b8dc9e4e0ae@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec