Fix `yarn version` bug with backports

[cee-chen]

Summary

I noticed this issue in our release script while doing a few backports for 8.16. It likely started when we upgraded from Yarn Classic to Yarn Berry, but I couldn't find a recent bug report in the yarn repo about it.

QA

• In CLI, run yarn version v97.3.0-backport.0 - package.json should update correctly as expected:
• Now run yarn version v97.3.0-backport.1 - notice that package.json does not update as expected:
• Rerun yarn version v97.3.0-backport.1 again and confirm that the second time, package.json is correct for whatever reason 🤷

General checklist

N/A, internal/dev only

[kibanamachine]

Preview staging links for this PR:

• Docs site: https://eui.elastic.co/pr_8114/
• Storybook: https://eui.elastic.co/pr_8114/storybook
• New docs: https://eui.elastic.co/pr_8114/new-docs

[elasticmachine]

:green_heart: Build Succeeded

• Buildkite Build
• Commit: e14a5a5e18a28a5b5a1c0b27043753a2e363a020