chore: fix the format of the deprecated comment

[reddaisyy]

What type of PR is this?

Documentation

What does this PR do? Why is it needed?

gocritic throw a warning: deprecatedComment: use Deprecated: (note the casing) instead of DEPRECATED:

Which issues(s) does this PR fix?

Fixes #

Other notes for review

Acknowledgements

• I have read CONTRIBUTING.md.
• I have included a uniquely named changelog fragment file.
• I have added a description to this PR with sufficient context for reviewers to understand this PR.

[CLAassistant]

All committers have signed the CLA.

[prestonvanloon]

If we are going to introduce this kind of change, we should include some kind of github workflow or CI check to enforce it going forward. Can you add one?

[reddaisyy]

If we are going to introduce this kind of change, we should include some kind of github workflow or CI check to enforce it going forward. Can you add one?

@prestonvanloon Sorry for handling this so late.

I have added a CI to detect these issues.

Please review again.

[reddaisyy]

Hi, @prestonvanloon If there's anything need I to do, please feel free to let me know.

[prestonvanloon]

@reddaisyy looks like your CI check is failing. If we are going to address this, then we should resolve it everywhere.

[reddaisyy]

@reddaisyy looks like your CI check is failing. If we are going to address this, then we should resolve it everywhere.

Sorry for deal so late.

@prestonvanloon Thanks for pointing this out. The previous CI check scanned the entire repository, but the PR only fixed one occurrence, so it still failed on beacon-chain/rpc/prysm/v1alpha1/node/server.go.

I've updated the PR on top of the latest develop branch and fixed all remaining DEPRECATED: comments. I also moved the enforcement into the existing Go lint workflow using a targeted git grep check, and added a changelog fragment.

The relevant package tests and local workflow checks pass. Could you please take another look?