Migrate 0, 0, 0 to vector.zero where appropriate

Author: CadeusTheGreat

content/en-us/luau/tuples.md

@@ -10,7 +10,7 @@ A **tuple** is a list of values. Many [methods](./functions.md#methods) and [cal
 If a [method](./functions.md#methods) or [callback](./functions.md#callbacks) accepts a tuple as a parameter, then it accepts multiple values. For example, the API Reference shows that the `Class.BindableFunction:Invoke()` method accepts a "Tuple" as a parameter, so it accepts multiple arguments.
 
 ```lua
-BindableFunction:Invoke(1, true, "string", vector.new(0, 0, 0))
+BindableFunction:Invoke(1, true, "string", vector.zero)
 ```
 
 ## Returns

content/en-us/reference/engine/classes/ViewportFrame.yaml

@@ -164,7 +164,7 @@ properties:
       A `Datatype.Vector3` representing the direction of the light source.
     description: |
       A `Datatype.Vector3` representing the direction of the light source from
-      position `Datatype.Vector3|vector.new(0, 0, 0)`. Defaults to
+      position `Datatype.Vector3|vector.zero`. Defaults to
       `Datatype.Vector3|vector.new(-1, -1, -1)`.
     code_samples:
     type: Vector3