Fix typo

index.bs

@@ -4034,7 +4034,7 @@ even if the SafetyNet API is also present.
     - Verify that |response| is a valid SafetyNet response of version |ver|.
     - Verify that the nonce in the |response| is identical to the Base64url encoding of the SHA-256 hash of the concatenation of |authenticatorData| and |clientDataHash|.
     - Let |attestationCert| be the [=attestation certificate=].
-    - Verify that |attestatioCert| is issued to the hostname "attest.android.com" (see
+    - Verify that |attestationCert| is issued to the hostname "attest.android.com" (see
         [SafetyNet online documentation](https://developer.android.com/training/safetynet/index.html#compat-check-response)).
     - Verify that the `ctsProfileMatch` attribute in the payload of |response| is [TRUE].
     - If successful, return implementation-specific values representing [=attestation type=] [=Basic=] and [=attestation trust