Fix typo: "disbaleZoom" → "disableZoom" in README

## What this PR does

This PR fixes a typo in the README file.

### Before:

disbaleZoom: 1

### After

disableZoom: 1

Author: Hongtao Lin

README.md

@@ -51,7 +51,7 @@ title: The random graph
 xLabel: Time
 yLabel: Cost
 bounds: [0, 10, 0, 50]
-disbaleZoom: 1
+disableZoom: 1
 grid: true
 ---
 g(x)=x^PI