Update frequenz-api-common requirement

Updates the requirements on [frequenz-api-common](https://github.com/frequenz-floss/frequenz-api-common) to permit the latest version.
- [Release notes](https://github.com/frequenz-floss/frequenz-api-common/releases)
- [Changelog](https://github.com/frequenz-floss/frequenz-api-common/blob/v0.x.x/RELEASE_NOTES.md)
- [Commits](frequenz-floss/frequenz-api-common@v0.6.5...v0.8.0)

---
updated-dependencies:
- dependency-name: frequenz-api-common
  dependency-version: 0.8.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -44,7 +44,7 @@ classifiers = [
 ]
 requires-python = ">= 3.11, < 4"
 dependencies = [
-  "frequenz-api-common >= 0.6.5, < 0.7.0",
+  "frequenz-api-common >= 0.6.5, < 0.9.0",
   # We can't widen beyond the current value unless we bump the minimum
   # requirements too because of protobuf cross-version runtime guarantees:
   # https://protobuf.dev/support/cross-version-runtime-guarantee/#major