[stable/memcached] Add olemarkus as maintainer for this chart (#6848)

stable/memcached/.helmignore

@@ -1 +1,2 @@
 .git
+OWNERS

stable/memcached/Chart.yaml

@@ -1,5 +1,5 @@
 name: memcached
-version: 2.2.0
+version: 2.2.1
 appVersion: 1.5.6
 description: Free & open source, high-performance, distributed memory object caching
   system.
@@ -13,4 +13,6 @@ sources:
 maintainers:
 - name: gtaylor
   email: gtaylor@gc-taylor.com
+- name: olemarkus
+  email: o.with@sportradar.com
 engine: gotpl

stable/memcached/OWNERS

@@ -0,0 +1,6 @@
+approvers:
+- olemarkus
+- gtaylor
+reviewers:
+- olemarkus
+- gtaylor