Update about.html

Author: Gmac4247

about.html

@@ -173,7 +173,7 @@
 },
 "dateCreated" :"2024-08-31",
 "datePublished":"2024-08-31",
-"dateModified" :"2025-01-15",
+"dateModified" :"2025-01-28",
 "description" :"History and disapproval of the mathematical constant π; derivation of the properties of shapes from the area of a circle.",
 "disambiguatingDescription": "Exact formulas. No pi.",	
 	"image":[
@@ -206,7 +206,7 @@
       "availability": "https://schema.org/InStock"
     },
 "schemaVersion" :
-"https://schema.org/docs/releases.html#v27.02.",
+"https://schema.org/docs/releases.html#v28.1.",
 "sdDatePublished" :"2024-08-31",
 "sdPublisher" :
 {"@type" : "Person" ,