chore: update conformance badge (#3114)

We need to report conformance results from the default branch only.

Signed-off-by: Ramkumar Chinchani <rchincha.dev@gmail.com>

README.md

@@ -1,5 +1,5 @@
 # zot
-[![build](https://github.com/project-zot/zot/actions/workflows/build.yaml/badge.svg?branch=main)](https://github.com/project-zot/zot/actions/workflows/build.yaml) [![test](https://github.com/project-zot/zot/actions/workflows/test.yaml/badge.svg?branch=main)](https://github.com/project-zot/zot/actions/workflows/test.yaml) [![nightly jobs](https://github.com/project-zot/zot/actions/workflows/nightly.yaml/badge.svg)](https://github.com/project-zot/zot/actions/workflows/nightly.yaml) [![codecov](https://codecov.io/gh/project-zot/zot/branch/main/graph/badge.svg?token=US6rAoFYoc)](https://codecov.io/gh/project-zot/zot) [![Conformance Results](https://github.com/project-zot/zot/workflows/conformance/badge.svg)](https://github.com/project-zot/zot/actions?query=workflow%3Aconformance) [![CodeQL](https://github.com/project-zot/zot/workflows/CodeQL/badge.svg)](https://github.com/project-zot/zot/actions?query=workflow%3ACodeQL) [![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/5425/badge)](https://bestpractices.coreinfrastructure.org/projects/5425) [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/project-zot/zot/badge)](https://securityscorecards.dev/viewer/?uri=github.com/project-zot/zot) [![Go Reference](https://pkg.go.dev/badge/zotregistry.dev/zot.svg)](https://pkg.go.dev/zotregistry.dev/zot) [![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2Fproject-zot%2Fzot.svg?type=shield)](https://app.fossa.com/projects/git%2Bgithub.com%2Fproject-zot%2Fzot?ref=badge_shield)
+[![build](https://github.com/project-zot/zot/actions/workflows/build.yaml/badge.svg?branch=main)](https://github.com/project-zot/zot/actions/workflows/build.yaml) [![test](https://github.com/project-zot/zot/actions/workflows/test.yaml/badge.svg?branch=main)](https://github.com/project-zot/zot/actions/workflows/test.yaml) [![nightly jobs](https://github.com/project-zot/zot/actions/workflows/nightly.yaml/badge.svg)](https://github.com/project-zot/zot/actions/workflows/nightly.yaml) [![codecov](https://codecov.io/gh/project-zot/zot/branch/main/graph/badge.svg?token=US6rAoFYoc)](https://codecov.io/gh/project-zot/zot) [![conformance](https://github.com/project-zot/zot/actions/workflows/oci-conformance-action.yaml/badge.svg)](https://github.com/project-zot/zot/actions/workflows/oci-conformance-action.yaml) [![CodeQL](https://github.com/project-zot/zot/workflows/CodeQL/badge.svg)](https://github.com/project-zot/zot/actions?query=workflow%3ACodeQL) [![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/5425/badge)](https://bestpractices.coreinfrastructure.org/projects/5425) [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/project-zot/zot/badge)](https://securityscorecards.dev/viewer/?uri=github.com/project-zot/zot) [![Go Reference](https://pkg.go.dev/badge/zotregistry.dev/zot.svg)](https://pkg.go.dev/zotregistry.dev/zot) [![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2Fproject-zot%2Fzot.svg?type=shield)](https://app.fossa.com/projects/git%2Bgithub.com%2Fproject-zot%2Fzot?ref=badge_shield)
 
 **zot**: a production-ready vendor-neutral OCI image registry - images stored in [OCI image format](https://github.com/opencontainers/image-spec), [distribution specification](https://github.com/opencontainers/distribution-spec) on-the-wire, that's it!
 
@@ -9,4 +9,4 @@ Code of conduct details are [here](CODE_OF_CONDUCT.md).
 
 
 ## License
-[![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2Fproject-zot%2Fzot.svg?type=large)](https://app.fossa.com/projects/git%2Bgithub.com%2Fproject-zot%2Fzot?ref=badge_large)
+[![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2Fproject-zot%2Fzot.svg?type=large)](https://app.fossa.com/projects/git%2Bgithub.com%2Fproject-zot%2Fzot?ref=badge_large)