Typo correction insensitie > insensitive (#3295)

Author: Reisclef

xml/System.Text.Json/JsonSerializerOptions.xml

@@ -321,7 +321,7 @@ Going past this depth throws a <xref:System.Text.Json.JsonException>.
 
 ## Remarks
 
-There is a performance cost associated with case-insensitie comparison (that is, when `PropertyNameCaseInsensitive` is `true`).
+There is a performance cost associated with case-insensitive comparison (that is, when `PropertyNameCaseInsensitive` is `true`).
 
           ]]></format>
         </remarks>