OWNERS: Fix typo for vts_gki_compliance tests

vts_gki_compliance test is a cpp file, not a c file, so fix
that.

Bug: 340263693
Change-Id: I075a1dbc4fc8f2e08022bde9bdc4ee58f7ddc792
Signed-off-by: Isaac J. Manjarres <isaacmanjarres@google.com>
1 file changed