Bump prometheus-client from 0.21.1 to 0.22.0 (#952)

Bumps [prometheus-client](https://github.com/prometheus/client_python) from 0.21.1 to 0.22.0.
- [Release notes](https://github.com/prometheus/client_python/releases)
- [Commits](prometheus/client_python@v0.21.1...v0.22.0)

---
updated-dependencies:
- dependency-name: prometheus-client
  dependency-version: 0.22.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Peter Boers <peter.boers@surf.nl>

Author: dependabot[bot]

pyproject.toml

@@ -47,7 +47,7 @@ dependencies = [
     "itsdangerous",
     "Jinja2==3.1.6",
     "orjson==3.10.18",
-    "prometheus-client==0.21.1",
+    "prometheus-client==0.22.0",
     "psycopg2-binary==2.9.10",
     "pydantic[email]~=2.8.2",
     "pydantic-settings~=2.9.1",