chore(deps-dev): bump the gha group across 1 directory with 4 updates

Bumps the gha group with 4 updates in the /packages/opentelemetry-instrumentation-haystack directory: [flake8](https://github.com/pycqa/flake8), [pytest](https://github.com/pytest-dev/pytest), [haystack-ai](https://github.com/deepset-ai/haystack) and [vcrpy](https://github.com/kevin1024/vcrpy).


Updates `flake8` from 7.0.0 to 7.1.2
- [Commits](PyCQA/flake8@7.0.0...7.1.2)

Updates `pytest` from 8.2.2 to 8.3.5
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.2.2...8.3.5)

Updates `haystack-ai` from 2.3.1 to 2.11.2
- [Release notes](https://github.com/deepset-ai/haystack/releases)
- [Commits](deepset-ai/haystack@v2.3.1...v2.11.2)

Updates `vcrpy` from 6.0.1 to 7.0.0
- [Release notes](https://github.com/kevin1024/vcrpy/releases)
- [Changelog](https://github.com/kevin1024/vcrpy/blob/master/docs/changelog.rst)
- [Commits](kevin1024/vcrpy@v6.0.1...v7.0.0)

---
updated-dependencies:
- dependency-name: flake8
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: gha
- dependency-name: pytest
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: gha
- dependency-name: haystack-ai
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: gha
- dependency-name: vcrpy
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: gha
...

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

Author: dependabot[bot]