release: @formio/bootstrap@4.0.3

[lane-formio]

Automated sync from formio/nirvana for @formio/bootstrap@4.0.3 (monorepo 3aa6e9526e).

After merging, an engineer will tag the release:

git fetch origin
git tag v4.0.3 origin/main
git push origin v4.0.3

Generated by gh-workflows/bin/sync-oss.mjs.