Replace their with there and mention that Lighting.Technology cannot be accessed from Roblox Studio (#1057)

## Changes

Replaced "their are plans in the future" with "there are plans in the
future" in the How to use Scale section. Also I fixed a misinformation
stating that Lighting.Technology can be changed from Roblox Studio - it
can't be even read from studio.

## Checks

By submitting your pull request for review, you agree to the following:

- [x] This contribution was created in whole or in part by me, and I
have the right to submit it under the terms of this repository's open
source licenses.
- [x] I understand and agree that this contribution and a record of it
are public, maintained indefinitely, and may be redistributed under the
terms of this repository's open source licenses.
- [x] To the best of my knowledge, all proposed changes are accurate.

---------

Author: ExtremePro11299

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

@@ -96,10 +96,10 @@ properties:
         cylinder, using the lowest value.
       - `Class.SpecialMesh` objects with `Class.SpecialMesh.FileType` set to
         'Head' currently scale in a non standard manner. Developers should not
-        rely on this as their are plans to change this behavior
+        rely on this as there are plans to change this behavior.
       - `Class.SpecialMesh` objects with `Class.SpecialMesh.FileType` set to
         'Torso' scale in a non standard manner. Developers should not rely on
-        this as their are plans to deprecate this mesh type.
+        this as there are plans to deprecate this mesh type.
 
       #### Mesh scale demonstration
 

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

@@ -2,7 +2,8 @@ name: VideoService
 type: class
 category:
 memory_category: Instances
-summary: ''
+summary: |
+  An internal service that offers no functionality to developers.
 description: ''
 code_samples: []
 inherits: