Update index.html

minor typo fix.

index.html

@@ -3561,7 +3561,7 @@ <h3>Reserved Extension Points</h3>
 A property used for specifying one or more methods that a verifier 
 might use to increase their confidence that the value of an attribute in or of
 a verifiable credential or verifiable presentation is accurate, including but not
-limited to attributes such `initialRecipient` (a/k/a `issuee`), `presenter`,
+limited to attributes such as `initialRecipient` (a/k/a `issuee`), `presenter`,
 `authorizedPresenter`, `holder`, etc.
 The associated vocabulary URL MUST be
 `https://www.w3.org/2018/credentials#confidenceMethod`.