chore: make parity tests issues more unique

[LesnyRumcajs]

Summary of changes

Changes introduced in this pull request:

• Make those issues a bit more unique so it's easier to reference them in discussions. https://github.com/ChainSafe/forest/issues?q=is%3Aissue%20state%3Aopen%20RPC%20parity%20test%20failure

Reference issue to close (if applicable)

Closes

Other information and links

Used formatting from https://momentjs.com/docs/#/displaying/format/

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation. All new code adheres to the team's documentation standards,
• I have added tests that prove my fix is effective or that my feature works (if possible),
• I have made sure the CHANGELOG is up-to-date. All user-facing changes should be reflected in this document.