Typo

[elvey]

(Why are these steps correct anyway?
And why are a move followed by a non-overwriting copy described as a copy followed by a copy? How do these steps Migrate from Signal Official to Signal Unofficial? If anything, they do something closer to the opposite, no? )

First time contributor checklist:

• [ x] I have read the README and Contributor Guidelines
• [ x] I have signed the Contributor Licence Agreement

Contributor checklist:

• [ x] My contribution is not related to translations. Please submit translation changes via our Signal Desktop Transifex project.
• [ ] My commits are in nice logical chunks with good commit messages
• [ ] My changes are rebased on the latest development branch
• [ ] A yarn ready run passes successfully (more about tests here)
• [ ] My changes are ready to be shipped to users

Description

Just a typo fix.

Does it address any outstanding issues in this project?

• No.

Please write a summary of your test approach:

• What kind of manual testing did you do?
  • None - other than add a comment as I saved the edit.