chore(deps): bump thiserror from 2.0.18 to 2.0.19 in /bots/echidnabot

Bumps [thiserror](https://github.com/dtolnay/thiserror) from 2.0.18 to 2.0.19.
- [Release notes](https://github.com/dtolnay/thiserror/releases)
- [Commits](dtolnay/thiserror@2.0.18...2.0.19)

---
updated-dependencies:
- dependency-name: thiserror
  dependency-version: 2.0.19
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]