chore: update sierra file stem

[tserg]

Update .sierra to .contract_class as per software-mansion/scarb#610

[smonicas]

Hi thanks for your PR. If i understand correctly this will be from the next scarb version however i believe we should maintain backward compatibility with older scarb versions. I think checking if it ends with .sierra or .contract_class should work just fine. What do you think?

[tserg]

Hi thanks for your PR. If i understand correctly this will be from the next scarb version however i believe we should maintain backward compatibility with older scarb versions. I think checking if it ends with .sierra or .contract_class should work just fine. What do you think?

Hi, good point! I will make the changes.

[tserg]

Hi @smonicas, any update on the next steps? We are pending this to integrate Caracal into our CI.

[smonicas]

Hi, sorry i didn't imagine that you were using an unreleased scarb version but we'll do a release next week