build(deps-dev): bump types-pexpect

Bumps [types-pexpect](https://github.com/python/typeshed) from 4.9.0.20260127 to 4.9.0.20260408.
- [Commits](https://github.com/python/typeshed/commits)

---
updated-dependencies:
- dependency-name: types-pexpect
  dependency-version: 4.9.0.20260408
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]