deps(python): bump anthropic from 0.86.0 to 0.87.0

Bumps [anthropic](https://github.com/anthropics/anthropic-sdk-python) from 0.86.0 to 0.87.0.
- [Release notes](https://github.com/anthropics/anthropic-sdk-python/releases)
- [Changelog](https://github.com/anthropics/anthropic-sdk-python/blob/main/CHANGELOG.md)
- [Commits](anthropics/anthropic-sdk-python@v0.86.0...v0.87.0)

---
updated-dependencies:
- dependency-name: anthropic
  dependency-version: 0.87.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]