OWNERS: fix 'matchers'

The Gerrit plugin uses 'matchers' and not 'matches'.  Fix it.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: If4ff62042ea060bbb3eb94d77502fd3a4e1df467
diff --git a/OWNERS b/OWNERS
index 055faa5..4979a82 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 matches for granular 'owners' and
 #     'reviewers'.  See 'owners' plugin documentation.
 #
 #   * openbmc: A list of openbmc-specific meta-data about owners and reviewers.
@@ -40,7 +40,7 @@
 - anoo@us.ibm.com
 - gmills@linux.vnet.ibm.com
 
-matches:
+matchers:
 - exact: designs/device-tree-gpio-naming.md
   reviewers:
   - andrew@aj.id.au