the build status badges are broken in the readme

[304NotModified]

We see this, broken image voor build status:

If I go directly to the image url (https://dev.azure.com/wdcossey/GitHub/_apis/build/status/RazorEngineCore-Extensions-CI?branchName=master), it gives the error

{"count":1,"value":{"Message":"Build pipeline RazorEngineCore-Extensions-CI was not found."}}