XMSS is approved by NIST

[jiep]

File dss-education-table.js says that XMSS has not been selected by NIST, but NIST SP 800-208 [1] approves the use of XMSS with four different hash functions (see section 5 of NIST SP 800-208).

PQChoiceAssistant/src/js/json/dss-education-table.js

Line 70 in bc54154

"EN": "Not selected by NIST, but is specified in IETF RFC 8391 and also part of in ISO 14888-4"

The previous text should be updated and cite document NIST SP 800-208 [1].

[1] https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-208.pdf