Update add-ssh-key-to-ssh-agent documentation

[GuillaumeBAECHLER]

Why:

Update the add-ssh-key-to-ssh-agent documentation with the new key generation algorithm used in ssh key creation step (ed25519)

What's being changed:

Replaced id_rsa with id_ed25519 in :

• data/reusables/ssh/add-ssh-key-to-ssh-agent-commandline.md
• data/reusables/ssh/add-ssh-key-to-ssh-agent.md

Check off the following:

• All of the tests are passing.
• I have reviewed my changes in staging.
• For content changes, I have reviewed the localization checklist
• For content changes, I have reviewed the Content style guide for GitHub Docs.

[welcome]

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[janiceilene]

👋 @GuillaumeBAECHLER Thank you so much for opening a PR! Some of the updates in this PR are already being addressed in #1063. Would you mind removing the duplication? 💖

[GuillaumeBAECHLER]

Hi @janiceilene ! Can't find any duplication in the linked PR, the files concerned are not the same. Btw, I find there are a lot of PRs for this topic now. So we can close this PR if you want to address all changes linked to ed25519 documentation in a single one. 😄

[github-actions]

This PR is stale because it has been open 7 days with no activity and will be automatically closed in 3 days. To keep this PR open, update the PR by adding a comment or pushing a commit.

[shati-patel]

Thank you for the pull request @GuillaumeBAECHLER!

To come back to this:

Can't find any duplication in the linked PR, the files concerned are not the same. Btw, I find there are a lot of PRs for this topic now. So we can close this PR if you want to address all changes linked to ed25519 documentation in a single one. 😄

You're right, there are quite a few similar PRs 😅 I'm working my way through them in reverse chronological order. Yours is one of the first, so I'll merge this and close any later duplicates 🎉

[github-actions]

Thanks very much for contributing! Your pull request has been merged 🎉 You should see your changes appear on the site in approximately 24 hours.