Kubeflow docs: create an OWNERS file for other guides (#2192)

* Kubeflow docs: create an OWNERS file for other guides

* Add a new reviewer to OWNERS of Kubeflow Other Guides

* Add a second reviewer to OWNERS of Kubeflow Other Guides

* Update OWNERS, fix typo

content/en/docs/other-guides/OWNERS

+approvers:
+  - 8bitmp3
+  - RFMVasconcelos
+
+reviewers:
+  - alfsuse
+  - PatrickXYS