README.md: add openSUSE MicroOS

Signed-off-by: Johannes Kastl <[email protected]>

Author: kastl-ars

README.md

@@ -6,6 +6,7 @@
 | [Fedora](https://quay.io/repository/containerdisks/fedora)                           | amd64, arm64, s390x   |
 | [Ubuntu](https://quay.io/repository/containerdisks/ubuntu)                           | amd64, arm64, s390x   |
 | [OpenSUSE Tumbleweed](https://quay.io/repository/containerdisks/opensuse-tumbleweed) | amd64, s390x   |
+| [openSUSE MicroOS](https://quay.io/repository/containerdisks/opensuse-microos)       | amd64, s390x   |
 | [OpenSUSE Leap](https://quay.io/repository/containerdisks/opensuse-leap)             | amd64, arm64   |
 | [Debian](https://quay.io/repository/containerdisks/debian)                    | amd64, arm64   |