deps(identity): update ed25519-dalek to 2.0 (backport #4337)

[mergify]

This is an automatic backport of pull request #4337 done by Mergify.
Cherry-pick of fb61697 has failed:

On branch mergify/bp/v0.51/pr-4337
Your branch is up to date with 'origin/v0.51'.

You are currently cherry-picking commit fb616973.
  (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)

Changes to be committed:
	modified:   identity/src/ed25519.rs

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

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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[thomaseizinger]

cc @altonen

[altonen]

The conflicts are resolved but one DQ came up: since I don't have permissions to push into this repo, do I just create a PR that merges the fixes into mergify/bp/v0.51/pr-4337?

[thomaseizinger]

do I just create a PR that merges the fixes into mergify/bp/v0.51/pr-4337?

Either this or open your own PR and we close this one instead :)
If you open your own, make sure to target the correct branch!

[mergify]

This pull request has merge conflicts. Could you please resolve them @mergify[bot]? 🙏