build(deps): bump node-red from 3.1.14 to 3.1.15

Bumps [node-red](https://github.com/node-red/node-red) from 3.1.14 to 3.1.15.
- [Release notes](https://github.com/node-red/node-red/releases)
- [Changelog](https://github.com/node-red/node-red/blob/3.1.15/CHANGELOG.md)
- [Commits](node-red/node-red@3.1.14...3.1.15)

---
updated-dependencies:
- dependency-name: node-red
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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