Update sshkey to v2.0.0

What does this MR do?

Update sshkey to v2.0.0

This release fixes a bug in handling certain ed25519 keys. For more details, see this GitHub issue: https://github.com/bensie/sshkey/issues/34

What are the relevant issue numbers?

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated via this MR
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Tested in all supported browsers
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides
• Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.
• Security reports checked/validated by reviewer

Closes #47150 (closed)