Update README.md

Author: github-harunadev

README.md

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 # ViewPositionConstraint
 Very simple Unity C# script that automatically syncs avatar's view position with avatar Head bone scale.
+
+## What does it do?
+Once the constraint is activated, it will try to sync your avatar's view position property with your avatar's head bone.
+
+## How to use?
+1. Import .unitypackage to your project.
+2. Find your avatar's Head bone.
+3. Add View Position Constraint via "Add Component" button.
+4. Make sure your current view position is well-aligned with your needs.
+5. Press Activate to let it automatically configure the current offset & activate.
+6. You're now free to scale up/down the head bone. You can even scale up/down parent bones such as neck, chest, hips, or more.
+
+## Requirements
+- Unity 2022 3.22f1
+- VRChat Avatar SDK (Use VRChat Creator Companion)
+
+## Download
+[Download latest .unitypackage file from here](https://github.com/github-harunadev/ViewPositionConstraint/releases)