Fix typo in expander/grpcplugin/README.md

Signed-off-by: aleskandro <[email protected]>

Author: aleskandro

cluster-autoscaler/expander/grpcplugin/README.md

@@ -16,12 +16,12 @@ There are a wide variety of use cases here. Some examples are as follows:
 ## Configuration options
 As using this expander requires communication with another service, users must specify a few options as CLI arguments.
 
-```yaml
---grpcExpanderUrl
+```bash
+--grpc-expander-url
 ```
 URL of the gRPC Expander server, for CA to communicate with.
-```yaml
---grpcExpanderCert
+```bash
+--grpc-expander-cert
 ```
 Location of the volume mounted certificate of the gRPC server if it is configured to communicate over TLS
 
@@ -32,7 +32,7 @@ service. Note that the `protos/expander.pb.go` generated protobuf code will also
 Communication between Cluster Autoscaler and the gRPC Server will occur over native kube-proxy. To use this, note the Service and Namespace the gRPC server is deployed in.
 
 Deploy the gRPC Expander Server as a separate app, listening on a specifc port number.
-Start Cluster Autoscaler with the `--grpcExapnderURl=SERVICE_NAME.NAMESPACE_NAME.svc.cluster.local:PORT_NUMBER` flag, as well as `--grpcExpanderCert` pointed at the location of the volume mounted certificate of the gRPC server.
+Start Cluster Autoscaler with the `--grpc-expander-url=SERVICE_NAME.NAMESPACE_NAME.svc.cluster.local:PORT_NUMBER` flag, as well as `--grpc-expander-cert` pointed at the location of the volume mounted certificate of the gRPC server.
 
 ## Details