build(deps): bump posthtml-content from 1.0.2 to 1.0.3

Bumps [posthtml-content](https://github.com/posthtml/posthtml-content) from 1.0.2 to 1.0.3.
- [Release notes](https://github.com/posthtml/posthtml-content/releases)
- [Commits](posthtml/posthtml-content@v1.0.2...v1.0.3)

---
updated-dependencies:
- dependency-name: posthtml-content
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>