chore(deps): bump github.com/prometheus/client_golang

Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 1.20.2 to 1.20.4.
- [Release notes](https://github.com/prometheus/client_golang/releases)
- [Changelog](https://github.com/prometheus/client_golang/blob/main/CHANGELOG.md)
- [Commits](https://github.com/prometheus/client_golang/compare/v1.20.2...v1.20.4)

---
updated-dependencies:
- dependency-name: github.com/prometheus/client_golang
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

go.mod

@@ -74,7 +74,7 @@ require (
 	github.com/owncloud/libre-graph-api-go v1.0.5-0.20240829135935-80dc00d6f5ea
 	github.com/pkg/errors v0.9.1
 	github.com/pkg/xattr v0.4.10
-	github.com/prometheus/client_golang v1.20.2
+	github.com/prometheus/client_golang v1.20.4
 	github.com/r3labs/sse/v2 v2.10.0
 	github.com/riandyrn/otelchi v0.10.0
 	github.com/rogpeppe/go-internal v1.12.0