Resolve yaml load mechanism

Closes #97

I found 3 instances of the issue we found, so I have changed it in those 3 locations to use the suggested method.

Successful pipeline runs:

https://repo1.dsop.io/dsop/opensource/pipeline-test-project/install-cni-1.6/-/pipelines/63732

https://repo1.dsop.io/dsop/opensource/pipeline-test-project/ubi8-minimal/-/pipelines

https://repo1.dsop.io/dsop/opensource/pipeline-test-project/mattermost-operator/-/pipelines/63743

https://repo1.dsop.io/dsop/opensource/pipeline-test-project/kubectl/-/pipelines/63739