fix(release): manually release a major version

There was an issue with a major release, so this manual-releases.md
change is to release a new major version.

Reference: f810c8a

BREAKING CHANGE: BREAKING CHANGE: You need to uninstall `jest-dom` and install `@testing-library/jest-dom` instead. Then change your imports from `jest-dom` to `@testing-library/jest-dom`.

Author: Kent C. Dodds

other/manual-releases.md

@@ -41,4 +41,4 @@ change is to release a new patch version.
 Reference: #<the number of a relevant pull request, issue, or commit>
 ```
 
-The number of times we've had to do a manual release is: 2
+The number of times we've had to do a manual release is: 3