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 <patrick@stwcx.xyz>
Change-Id: I3c80571414a5152c9bf1805f232cd97dceb631f8
diff --git a/OWNERS b/OWNERS
index 5a31d18..aebecf2 100644
--- a/OWNERS
+++ b/OWNERS
@@ -20,7 +20,7 @@
 #   * reviewers: A list of individuals who have requested review notification
 #     on the repository.
 #
-#   * matches: A list of specific file/path matches for granular 'owners' and
+#   * matchers: A list of specific file/path matchers for granular 'owners' and
 #     'reviewers'.  See 'owners' plugin documentation.
 #
 #   * openbmc: A list of openbmc-specific meta-data about owners and reviewers.
@@ -39,7 +39,7 @@
 - bjwyman@gmail.com
 - liuxiwei@inspur.com
 
-matches:
+matchers:
 
 openbmc:
 - name: B.J. Wyman