Note that the Hash Function Claim value is case-sensitive (#525)

* Note that the Hash Function Claim value is case-sensitive

* This the that

Co-authored-by: Kristina <52878547+Sakurann@users.noreply.github.com>

---------

Co-authored-by: Kristina <52878547+Sakurann@users.noreply.github.com>

draft-ietf-oauth-selective-disclosure-jwt.md

@@ -339,6 +339,7 @@ appear at the top level of the SD-JWT payload. It
 MUST NOT be used in any object nested within the payload. If the  `_sd_alg`
 claim is not present at the top level, a default value of `sha-256` MUST be used.
 
+This claim value is a case-sensitive string with the hash algorithm identifier.
 The hash algorithm identifier MUST be a hash algorithm value from the "Hash Name
 String" column in the IANA "Named Information Hash Algorithm" registry
 [@IANA.Hash.Algorithms] or a value defined in another specification and/or
@@ -1896,6 +1897,7 @@ data. The original JSON data is then used by the application. See
 
    -14
 
+   * Note that the Hash Function Claim value is case-sensitive
    * Update the `typ` value in the SD-JWT VC example to `dc+sd-jwt` to align with anticipated changes in the SD-JWT VC draft.
 
    -13