docs: update README to reflect renamed function

Author: oosawy

README.md

@@ -787,9 +787,9 @@ The `@Transform` decorator is given more arguments to let you configure how you
 
 | Signature                | Example                                              | Description                                                                           |
 | ------------------------ | ---------------------------------------------------- | ------------------------------------------------------------------------------------- |
-| `@TransformClassToPlain` | `@TransformClassToPlain({ groups: ["user"] })`       | Transform the method return with instanceToPlain and expose the properties on the class. |
-| `@TransformClassToClass` | `@TransformClassToClass({ groups: ["user"] })`       | Transform the method return with instanceToInstance and expose the properties on the class. |
-| `@TransformPlainToClass` | `@TransformPlainToClass(User, { groups: ["user"] })` | Transform the method return with plainToInstance and expose the properties on the class. |
+| `@TransformInstanceToPlain` | `@TransformInstanceToPlain({ groups: ["user"] })`       | Transform the method return with instanceToPlain and expose the properties on the class. |
+| `@TransformInstanceToInstance` | `@TransformInstanceToInstance({ groups: ["user"] })`       | Transform the method return with instanceToInstance and expose the properties on the class. |
+| `@TransformPlainToInstance` | `@TransformPlainToInstance(User, { groups: ["user"] })` | Transform the method return with plainToInstance and expose the properties on the class. |
 
 The above decorators accept one optional argument:
 ClassTransformOptions - The transform options like groups, version, name
@@ -814,7 +814,7 @@ class User {
 }
 
 class UserController {
-  @TransformClassToPlain({ groups: ['user.email'] })
+  @TransformInstanceToPlain({ groups: ['user.email'] })
   getUser() {
     const user = new User();
     user.firstName = 'Snir';