<pre style="white-space:pre-wrap;width:81ex">Bump jest from 26.6.1 to 26.6.3 (#15119)

Bumps [jest](https://github.com/facebook/jest) from 26.6.1 to 26.6.3.
- [Release notes](https://github.com/facebook/jest/releases)
- [Changelog](https://github.com/facebook/jest/blob/master/CHANGELOG.md)
- [Commits](https://github.com/facebook/jest/compare/v26.6.1...v26.6.3)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com></pre>
https://github.com/tootsuite/mastodon/commit/5eef34b15137f7090bd553a9056e88ef474a7831