Bump google.golang.org/grpc from 1.53.0 to 1.56.3

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.53.0 to 1.56.3.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.53.0...v1.56.3)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-type: indirect
...

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

vendor/google.golang.org/grpc/balancer/balancer.go

@@ -286,7 +286,7 @@ type PickResult struct {
 	//
 	// LB policies with child policies are responsible for propagating metadata
 	// injected by their children to the ClientConn, as part of Pick().
-	Metatada metadata.MD
+	Metadata metadata.MD
 }
 
 // TransientFailureError returns e.  It exists for backward compatibility and