Bump wp-cli/export-command from 2.0.12 to 2.1.0

Bumps [wp-cli/export-command](https://github.com/wp-cli/export-command) from 2.0.12 to 2.1.0.
- [Release notes](https://github.com/wp-cli/export-command/releases)
- [Commits](wp-cli/export-command@v2.0.12...v2.1.0)

---
updated-dependencies:
- dependency-name: wp-cli/export-command
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>