build(deps-dev): Bump @smithy/util-defaults-mode-browser

Bumps [@smithy/util-defaults-mode-browser](https://github.com/smithy-lang/smithy-typescript/tree/HEAD/packages/util-defaults-mode-node) from 4.1.4 to 4.2.0.
- [Release notes](https://github.com/smithy-lang/smithy-typescript/releases)
- [Changelog](https://github.com/smithy-lang/smithy-typescript/blob/main/packages/util-defaults-mode-node/CHANGELOG.md)
- [Commits](https://github.com/smithy-lang/smithy-typescript/commits/@smithy/util-defaults-mode-browser@4.2.0/packages/util-defaults-mode-node)

---
updated-dependencies:
- dependency-name: "@smithy/util-defaults-mode-browser"
  dependency-version: 4.2.0
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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