Update PRESUBMIT.cfg to include checks for release_notes.

BUG=b/173034990
TEST=manually checking on some changelists.
RELEASE_NOTE=None

Change-Id: I45dd969f9e1454546c0c7edcd3caa53e45dda160
Reviewed-on: https://cos-review.googlesource.com/c/third_party/overlays/chromiumos-overlay/+/8608
Reviewed-by: Dexter Rivera <riverade@google.com>
Tested-by: Vaibhav Rustagi <vaibhavrustagi@google.com>
1 file changed