README: OWNERS is the new MAINTAINERS

Change 0f22eaa000 removed the MAINTAINERS file, as it has been replaced
by OWNERS. However, we still have a reference to the former in the
README doc.

This change updates that to refer to OWNERS instead.

Fixes: 0f22eaa ("libmctp: Remove MAINTAINERS in favour of OWNERS file")
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Change-Id: I57e918bac37269dc94b2a1e4625566d866c1b446
diff --git a/README.md b/README.md
index 9b986d1..5c554ba 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 Contact
 -------
 
-* Email: See [MAINTAINERS](MAINTAINERS). Please also Cc openbmc@lists.ozlabs.org
+* Email: See [OWNERS](OWNERS). Please also Cc openbmc@lists.ozlabs.org
 * Discord: #mctp on https://discord.gg/69Km47zH98
 * IRC: #openbmc on Freenode