Update versions/3.1.0.md

Co-Authored-By: Carsten Brandt <[email protected]>

Author: Phil Sturgeon

versions/3.1.0.md

@@ -2278,7 +2278,7 @@ Unless stated otherwise, the property definitions follow the JSON Schema.
 
 ##### Properties
 
-OpenAPI v3.1 is a JSON Schema vocabulary which eetends JSON Schema Core and Validation vocabularies. As such any keyword available for those vocabularies is by definition available in OpenAPI, and will work the exact same way, including but not limited to:
+OpenAPI v3.1 is a JSON Schema vocabulary which extends JSON Schema Core and Validation vocabularies. As such any keyword available for those vocabularies is by definition available in OpenAPI, and will work the exact same way, including but not limited to:
 
 - title
 - type