Update vc-spec.md (#2669)

Nitpicking about spelling (idenity -> identity)

Author: LXIF

docs/vc-spec.md

@@ -96,7 +96,7 @@ In the attribute sharing flow a user must approve the issuance of a verifiable
 credential by an issuer, and this happens by approving a human-readable consent message from the issuer.
 
 Identity provider uses a VC-extension of  [ICRC-21](https://github.com/dfinity/wg-identity-authentication/blob/main/topics/icrc_21_consent_msg.md), and requests the consent message via `Icrc21VcConsentMessageRequest`,
-Upon successful response idenity provider displays the consent message from `Icrc21ConsentInfo` to the user.
+Upon successful response identity provider displays the consent message from `Icrc21ConsentInfo` to the user.
 
 ### 2: Derivation Origin