Bump wp-cli/db-command from 2.1.4 to 2.1.5

Bumps [wp-cli/db-command](https://github.com/wp-cli/db-command) from 2.1.4 to 2.1.5.
- [Release notes](https://github.com/wp-cli/db-command/releases)
- [Commits](wp-cli/db-command@v2.1.4...v2.1.5)

---
updated-dependencies:
- dependency-name: wp-cli/db-command
  dependency-version: 2.1.5
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]