chore(deps-dev): bump betterproto from 2.0.0b6 to 2.0.0b7

Bumps [betterproto](https://github.com/danielgtaylor/python-betterproto) from 2.0.0b6 to 2.0.0b7.
- [Release notes](https://github.com/danielgtaylor/python-betterproto/releases)
- [Changelog](https://github.com/danielgtaylor/python-betterproto/blob/master/CHANGELOG.md)
- [Commits](danielgtaylor/python-betterproto@v.2.0.0b6...v.2.0.0b7)

---
updated-dependencies:
- dependency-name: betterproto
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

poetry.lock

@@ -22,7 +22,7 @@ pydantic = "^2.5.3"
 
 [tool.poetry.group.dev.dependencies]
 black = { version = "^23.12.1", extras = ["jupyter"] }
-betterproto = { version = "2.0.0b6", extras = ["compiler"] }
+betterproto = { version = "2.0.0b7", extras = ["compiler"] }
 flake8 = "7.1.1"
 mypy = "1.4.1"
 pydot = "3.0.2"