Changelogs formatting updates for c10s

[castrojo]

Close, this should read lts-20250309: LTS (c10s.20250309)

Originally posted by @castrojo in #381 (comment)

[dosubot]

Hi, @castrojo. I'm Dosu, and I'm helping the bluefin-lts team manage their backlog. I'm marking this issue as stale.

Issue Summary

• Proposal for changelog formatting change regarding c10s.
• Suggested format: lts-20250309: LTS (c10s.20250309).
• No further comments or developments since the initial suggestion.

Next Steps

• Please confirm if this issue is still relevant to the latest version of the bluefin-lts repository by commenting here.
• If there is no response, the issue will be automatically closed in 7 days.

Thank you for your understanding and contribution!