fix the master ci config link in readme
the ci section contains a link to the master configuration for the
machine api operator component registry, this change fixes the link to
the current location.
@@ -172,7 +172,7 @@ More information about those files can be found in [ci-operator onboarding file]
[1]: https://github.com/openshift/machine-api-operator
[2]: https://github.com/openshift/release
[3]: https://github.com/openshift/release/blob/master/cluster/ci/config/prow/plugins.yaml
-[4]: https://github.com/openshift/release/blob/master/ci-operator/config/openshift/machine-api-operator/master.yaml
+[4]: https://github.com/openshift/release/blob/master/ci-operator/config/openshift/machine-api-operator/openshift-machine-api-operator-master.yaml
[5]: https://github.com/openshift/release/blob/master/ci-operator/jobs/openshift/machine-api-operator/openshift-machine-api-operator-master-presubmits.yaml
[6]: https://github.com/openshift/release/blob/master/ci-operator/jobs/openshift/machine-api-operator/openshift-machine-api-operator-master-postsubmits.yaml
[7]: https://github.com/openshift/ci-operator/blob/master/ONBOARD.md
