build(deps): bump google.golang.org/grpc in /api/v2

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.55.0 to 1.56.0.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](grpc/grpc-go@v1.55.0...v1.56.0)

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

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

api/v2/go.mod

@@ -3,14 +3,14 @@ module github.com/dexidp/dex/api/v2
 go 1.17
 
 require (
-	google.golang.org/grpc v1.55.0
+	google.golang.org/grpc v1.56.0
 	google.golang.org/protobuf v1.30.0
 )
 
 require (
 	github.com/golang/protobuf v1.5.3 // indirect
-	golang.org/x/net v0.8.0 // indirect
-	golang.org/x/sys v0.6.0 // indirect
-	golang.org/x/text v0.8.0 // indirect
-	google.golang.org/genproto v0.0.0-20230306155012-7f2fa6fef1f4 // indirect
+	golang.org/x/net v0.9.0 // indirect
+	golang.org/x/sys v0.7.0 // indirect
+	golang.org/x/text v0.9.0 // indirect
+	google.golang.org/genproto v0.0.0-20230410155749-daa745c078e1 // indirect
 )