add n4d pricing

Author: mariafromano-25

cluster-autoscaler/cloudprovider/gce/gce_price_info.go

@@ -83,6 +83,7 @@ var (
 		"n2":  0.031611,
 		"n2d": 0.027502,
 		"n4":  0.030821,
+		"n4d": 0.032578,
 		"t2d": 0.027502,
 		"z3":  0.0496531,
 	}
@@ -101,6 +102,7 @@ var (
 		"n2":  0.004237,
 		"n2d": 0.003686,
 		"n4":  0.004131,
+		"n4d": 0.3,
 		"t2d": 0.003686,
 		"z3":  0.0066553,
 	}
@@ -119,6 +121,7 @@ var (
 		"n2":  0.007650 / 0.031611,
 		"n2d": 0.002773 / 0.027502,
 		"n4":  0.007976 / 0.030821,
+		"n4d": 0.0130312 / 0.032578,
 		"t2d": 0.006655 / 0.027502,
 		"z3":  0.0165 / 0.0496531,
 	}