Bump loader-utils from 2.0.3 to 2.0.4 in /dashboards-reports (opensea…

…rch-project#539) (opensearch-project#541)

Bumps [loader-utils](https://github.com/webpack/loader-utils) from 2.0.3 to 2.0.4.
- [Release notes](https://github.com/webpack/loader-utils/releases)
- [Changelog](https://github.com/webpack/loader-utils/blob/v2.0.4/CHANGELOG.md)
- [Commits](webpack/loader-utils@v2.0.3...v2.0.4)

---
updated-dependencies:
- dependency-name: loader-utils
  dependency-type: indirect
...

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(cherry picked from commit 69805c42a3ae424a60664a7512b8b27f5119a92a)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>