deps(npm): bump openclaw from 2026.4.2 to 2026.4.8 (#99)

Bumps [openclaw](https://github.com/openclaw/openclaw) from 2026.4.2 to 2026.4.8.
- [Release notes](https://github.com/openclaw/openclaw/releases)
- [Commits](openclaw/openclaw@v2026.4.2...v2026.4.8)

---
updated-dependencies:
- dependency-name: openclaw
  dependency-version: 2026.4.8
  dependency-type: direct:development
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]