Modify accessibility features in about.html

Updated accessibility features in the About page schema.

Author: Gmac4247

about.html

@@ -88,11 +88,7 @@
   "@type": "AboutPage",
   "name": "About Basic Geometry Formulas",
   "alternateName": "About page",
-  "accessMode": "textOnVisual",
-"accessibilityFeature": [
-"dyslexicFriendly", 
-"extended explanations"
-],
+    "accessMode": ["textual", "visual"],
 "accessibilityHazard": "none",
 "accessibilitySummary": "Mostly textual explanation with an animated figure and a video." ,
 "accountablePerson": {