(chore) upgrade yarn to v4

[pirupius]

Requirements

• This PR has a title that briefly describes the work done including the ticket number. If there is a ticket, make sure your PR title includes a conventional commit label. See existing PR titles for inspiration.
• My work conforms to the OpenMRS 3.0 Styleguide and design documentation.
• My work includes tests or is validated by existing tests.

Summary

This PR bumps Yarn to v4.

Screenshots

Related Issue

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[github-actions]

Size Change: 0 B

Total Size: 1.05 MB

ℹ️ View Unchanged

Filename	Size
dist/125.js	89.8 kB
dist/225.js	9.82 kB
dist/272.js	6.59 kB
dist/294.js	2.63 kB
dist/340.js	189 kB
dist/366.js	6.94 kB
dist/612.js	6.59 kB
dist/693.js	1.57 kB
dist/709.js	2.42 kB
dist/787.js	822 B
dist/800.js	175 kB
dist/986.js	237 kB
dist/main.js	317 kB
dist/openmrs-form-engine-lib.js	3.22 kB

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[denniskigen]

LGTM. Thanks, @pirupius!