Bump the development-dependencies group with 5 updates (#490)

Bumps the development-dependencies group with 5 updates:

| Package | From | To |
| --- | --- | --- |
| [@eslint/js](https://github.com/eslint/eslint/tree/HEAD/packages/js) | `9.17.0` | `9.19.0` |
| [eslint](https://github.com/eslint/eslint) | `9.17.0` | `9.19.0` |
| [hugo-bin](https://github.com/fenneclab/hugo-bin) | `0.137.2` | `0.139.0` |
| [markdownlint-cli2](https://github.com/DavidAnson/markdownlint-cli2) | `0.17.1` | `0.17.2` |
| [postcss](https://github.com/postcss/postcss) | `8.4.49` | `8.5.1` |


Updates `@eslint/js` from 9.17.0 to 9.19.0
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/commits/v9.19.0/packages/js)

Updates `eslint` from 9.17.0 to 9.19.0
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](eslint/eslint@v9.17.0...v9.19.0)

Updates `hugo-bin` from 0.137.2 to 0.139.0
- [Release notes](https://github.com/fenneclab/hugo-bin/releases)
- [Commits](fenneclab/hugo-bin@v0.137.2...v0.139.0)

Updates `markdownlint-cli2` from 0.17.1 to 0.17.2
- [Changelog](https://github.com/DavidAnson/markdownlint-cli2/blob/main/CHANGELOG.md)
- [Commits](DavidAnson/markdownlint-cli2@v0.17.1...v0.17.2)

Updates `postcss` from 8.4.49 to 8.5.1
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.49...8.5.1)

---
updated-dependencies:
- dependency-name: "@eslint/js"
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
- dependency-name: eslint
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
- dependency-name: hugo-bin
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
- dependency-name: markdownlint-cli2
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: development-dependencies
- dependency-name: postcss
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
...

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Author: dependabot[bot]