OWNERS: add myself as maintainer

This repo is in maintenance mode at this point and is primarily of
interest to IBM. Add myself as a maintainer to support the
occasional updates.

Change-Id: Ie6ece92c99d492a522eda5bc7cdbce0e64b2d0fb
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/OWNERS b/OWNERS
index 87ef840..7d6c548 100644
--- a/OWNERS
+++ b/OWNERS
@@ -33,6 +33,7 @@
 
 owners:
 - andrew@aj.id.au
+- geissonator@yahoo.com
 
 reviewers:
 
@@ -42,3 +43,6 @@
 - name: Andrew Jeffery
   email: andrew@aj.id.au
   discord: arj
+- name: Andrew Geissler
+  email: geissonator@yahoo.com
+  discord: geissonator