Bump google.golang.org/grpc in /extension/sigv4authextension

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.56.1 to 1.59.0.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](grpc/grpc-go@v1.56.1...v1.59.0)

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

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

extension/sigv4authextension/go.mod

@@ -13,7 +13,7 @@ require (
 	go.opentelemetry.io/collector/extension v0.81.0
 	go.opentelemetry.io/collector/extension/auth v0.81.0
 	go.uber.org/zap v1.24.0
-	google.golang.org/grpc v1.56.1
+	google.golang.org/grpc v1.59.0
 )
 
 require (
@@ -42,10 +42,10 @@ require (
 	go.opentelemetry.io/otel/trace v1.16.0 // indirect
 	go.uber.org/atomic v1.10.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/net v0.11.0 // indirect
-	golang.org/x/sys v0.9.0 // indirect
-	golang.org/x/text v0.10.0 // indirect
-	google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1 // indirect
+	golang.org/x/net v0.14.0 // indirect
+	golang.org/x/sys v0.11.0 // indirect
+	golang.org/x/text v0.12.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20230822172742-b8732ec3820d // indirect
 	google.golang.org/protobuf v1.31.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )