Key binding sd_hash computation is incorrect

[c2bo]

SD-JWT defines the sd_hash claim in the KB-JWT as:

  The hash value in the sd_hash claim binds the KB-JWT to the specific
   SD-JWT.  The sd_hash value MUST be taken over the US-ASCII bytes of
   the encoded SD-JWT, i.e., the Issuer-signed JWT, a tilde character,
   and zero or more Disclosures selected for presentation to the
   Verifier, each followed by a tilde character:

   <Issuer-signed JWT>~<Disclosure 1>~<Disclosure 2>~...~<Disclosure N>~

https://drafts.oauth.net/oauth-selective-disclosure-jwt/draft-ietf-oauth-selective-disclosure-jwt.html#section-5.3.1

The last tilde is missing in the implementation in this repository (e.g., here https://github.com/openwallet-foundation-labs/sd-jwt-rust/blob/main/src/verifier.rs#L200-L218) resulting in invalid sd_hash values.