Add bage for openQA in openQA test (appliance) (os-autoinst#5030)

Now that we have badges let's use them!

![image](https://user-images.githubusercontent.com/229240/224089903-c940e408-335f-4b6a-8b8b-6c1485ea69bc.png)

README.asciidoc

@@ -1,9 +1,10 @@
 :circleci: image:https://circleci.com/gh/os-autoinst/openQA/tree/master.svg?style=svg["CircleCI", link="https://circleci.com/gh/os-autoinst/openQA/tree/master"]
 :codecov: image:https://codecov.io/gh/os-autoinst/openQA/branch/master/graph/badge.svg[link=https://codecov.io/gh/os-autoinst/openQA]
+:appliance: image:https://openqa.opensuse.org/tests/latest/badge?arch=x86_64&distri=openqa&flavor=dev&machine=64bit-2G&test=openqa_install%2Bpublish&version=Tumbleweed[link="https://openqa.opensuse.org/tests/latest?arch=x86_64&distri=openqa&flavor=dev&machine=64bit-2G&test=openqa_install%2Bpublish&version=Tumbleweed"]
 
 = openQA
 
-{codecov} {circleci}
+{codecov} {circleci} {appliance}
 
 openQA is a testing framework that allows you to test GUI applications on one
 hand and bootloader and kernel on the other. In both cases, it is difficult to