Update frequenz-client-base requirement

Updates the requirements on [frequenz-client-base](https://github.com/frequenz-floss/frequenz-client-base-python) to permit the latest version.
- [Release notes](https://github.com/frequenz-floss/frequenz-client-base-python/releases)
- [Changelog](https://github.com/frequenz-floss/frequenz-client-base-python/blob/v0.x.x/RELEASE_NOTES.md)
- [Commits](frequenz-floss/frequenz-client-base-python@v0.6.0...v0.7.0)

---
updated-dependencies:
- dependency-name: frequenz-client-base
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -38,7 +38,7 @@ requires-python = ">= 3.11, < 4"
 dependencies = [
   "frequenz-api-microgrid >= 0.15.3, < 0.16.0",
   "frequenz-channels >= 1.0.0-rc1, < 2.0.0",
-  "frequenz-client-base >= 0.6.0, < 0.7",
+  "frequenz-client-base >= 0.6.0, < 0.8",
   "grpcio >= 1.54.2, < 2",
   "protobuf >= 4.21.6, < 6",
   "timezonefinder >= 6.2.0, < 7",