Fix typo in README.md deploy to deployment

# cat deploy/mutatingwebhook.yaml | \
    deploy/webhook-patch-ca-bundle.sh > \
    deploy/mutatingwebhook-ca-bundle.yaml

README.md

@@ -56,7 +56,7 @@ admissionregistration.k8s.io/v1beta1
 2. Create a signed cert/key pair and store it in a Kubernetes `secret` that will be consumed by sidecar injector deployment:
 
 ```
-# ./deploy/webhook-create-signed-cert.sh \
+# ./deployment/webhook-create-signed-cert.sh \
     --service sidecar-injector-webhook-svc \
     --secret sidecar-injector-webhook-certs \
     --namespace sidecar-injector