build(deps): bump google.golang.org/grpc in /contrib/config/etcd (#2662)

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.50.1 to 1.53.0.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.50.1...v1.53.0)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

contrib/config/etcd/go.mod

@@ -5,7 +5,7 @@ go 1.16
 require (
 	github.com/go-kratos/kratos/v2 v2.4.0
 	go.etcd.io/etcd/client/v3 v3.5.4
-	google.golang.org/grpc v1.50.1
+	google.golang.org/grpc v1.53.0
 )
 
 replace github.com/go-kratos/kratos/v2 => ../../../