fix bech32 prefix in evidence (bp #8461)

[mergify]

This is an automatic backport of pull request #8461 done by Mergify.

Cherry-pick of d6e4a2e has failed:

On branch mergify/bp/release/v0.42.x/pr-8461
Your branch is up to date with 'origin/release/v0.42.x'.

You are currently cherry-picking commit d6e4a2e9b.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   CHANGELOG.md

no changes added to commit (use "git add" and/or "git commit -a")

To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

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[amaury1093]

sorry for the noise