Yarn: Pin version of @yarnpkg packages to support Node 16

[valentinpalkovic]

Closes N/A

What I did

Pinned the version of @yarnpkg packages to support Node 16

How to test

Not necessary

Checklist

• Make sure your changes are tested (stories and/or unit, integration, or end-to-end tests)
• Make sure to add/update documentation regarding your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Maintainers

• If this PR should be tested against many or all sandboxes,
  make sure to add the ci:merged or ci:daily GH label to it.
• Make sure this PR contains one of the labels below.

["cleanup", "BREAKING CHANGE", "feature request", "bug", "documentation", "maintenance", "dependencies", "other"]

[socket-security]

Updated dependencies detected. Learn more about Socket for GitHub ↗︎

Packages	Version	New capabilities	Transitives	Size	Publisher
@yarnpkg/libzip	3.0.0-rc.48...3.0.0-rc.46	None	+2/-2	960 kB	yarnbot
@yarnpkg/fslib	3.0.0-rc.48...3.0.0-rc.46	None	+0/-0	222 kB	yarnbot