Bump go.etcd.io/etcd/client/v3 from 3.5.14 to 3.5.15 in /hello-grpc-go

Bumps [go.etcd.io/etcd/client/v3](https://github.com/etcd-io/etcd) from 3.5.14 to 3.5.15.
- [Release notes](https://github.com/etcd-io/etcd/releases)
- [Commits](etcd-io/etcd@v3.5.14...v3.5.15)

---
updated-dependencies:
- dependency-name: go.etcd.io/etcd/client/v3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Diff for: hello-grpc-go/go.mod

@@ -14,7 +14,7 @@ require (
 	// https://github.com/stretchr/testify/tags
 	github.com/stretchr/testify v1.9.0
 	// https://pkg.go.dev/go.etcd.io/etcd/client/v3?tab=versions
-	go.etcd.io/etcd/client/v3 v3.5.14
+	go.etcd.io/etcd/client/v3 v3.5.15
 	// https://pkg.go.dev/go.uber.org/ratelimit?tab=versions
 	go.uber.org/ratelimit v0.3.1
 	// https://pkg.go.dev/golang.org/x/net
@@ -33,8 +33,8 @@ require (
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/protobuf v1.5.4 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	go.etcd.io/etcd/api/v3 v3.5.14 // indirect
-	go.etcd.io/etcd/client/pkg/v3 v3.5.14 // indirect
+	go.etcd.io/etcd/api/v3 v3.5.15 // indirect
+	go.etcd.io/etcd/client/pkg/v3 v3.5.15 // indirect
 	go.uber.org/atomic v1.7.0 // indirect
 	go.uber.org/multierr v1.6.0 // indirect
 	go.uber.org/zap v1.18.1 // indirect