docs: fix broken link to bug bounty

[guckool]

Description

The link to the bug bounty mentioned in this readme is no longer valid, so I have updated it with the correct link which matches to the latest link mentioned in the cometbft spec: https://docs.cometbft.com/v0.38/spec/

PR checklist

• Tests written/updated
• Changelog entry added in .changelog (we use
  unclog to manage our changelog)
• Updated relevant documentation (docs/ or spec/) and code comments

No further tests is needed as only doc is modified

[rootulp]

IMO we should remove the entire spec/ directory from this fork rather than change one link.

[guckool]

IMO we should remove the entire spec/ directory from this fork rather than change one link.

Or should we remove the entire docs and leave only a readme in spec/ that points to the cometBFT spec repo?

[rootulp]

Or should we remove the entire docs and leave only a readme in spec/ that points to the cometBFT spec repo?

I think you mean entire specs and leave only a readme in spec/. That also works for me.

[guckool]

Hi @rootulp : sorry for that, to keep a clean history, I close this PR and combine those changes into one commit now.