Error on OCI style repositories

Seeing the following error when version-checker attempts to check the fluent-bit repository:

```
time="2023-10-16T21:36:44Z" level=error msg="cr.fluentbit.io/v2/fluent/fluent-bit/manifests/2.0: failed to get manifest response for tag, skipping (404): {\"errors\":[{\"code\":\"MANIFEST_UNKNOWN\",\"message\":\"OCI index found, but accept header does not support OCI indexes\"}]}\n" client=

time="2023-10-16T21:40:19Z" level=error msg="cr.fluentbit.io/v2/fluent/fluent-bit/manifests/sha256-9b386368a776f8f8a25ee7113ef8f39ae9004d3b6e8a80d0848bd9e37a9c6aae.sig: failed to get manifest response for tag, skipping (404): {\"errors\":[{\"code\":\"MANIFEST_UNKNOWN\",\"message\":\"OCI manifest found, but accept header does not support OCI manifests\"}]}\n" client=
```

Image of the container is `cr.fluentbit.io/fluent/fluent-bit:2.1.9`