Correct some typos in Design Details

Signed-off-by: Ricardo Pchevuzinske Katz <[email protected]>

Author: rikatz

keps/sig-network/2079-network-policy-port-range/README.md

@@ -164,10 +164,10 @@ type NetworkPolicyPort struct {
 	// +optional
 	Port       *intstr.IntOrString `json:"port,omitempty" protobuf:"bytes,2,opt,name=port"`
 
-    // To defines the end of the port range, being the end included within the
-    // range
-    // +optional
-    EndPort    int32 `json:"port,omitempty" protobuf:"bytes,2,opt,name=endPort"`
+	// EndPort defines the end of the port range, being the end included within the
+	// range
+	// +optional
+	EndPort    int32 `json:"port,omitempty" protobuf:"bytes,2,opt,name=endPort"`
 }
 ```