OWNERS: switch 'matches' to 'matchers'
OWNERS: switch 'matches' to 'matchers'

The original OWNERS template had a mistake which used 'matches' instead
of the field supported by the Gerrit plugin 'matchers'.  Update the
OWNERS file to have the correct field.

Signed-off-by: Patrick Williams <cbb7353e6d953ef360baf960c122346276c6e320@stwcx.xyz>
Change-Id: Iaa050737155ad72fadd0a177841ddb75d45141c1

openbmc/phosphor-pid-control,openbmc/phosphor-pid-control