chore: add unicode to informative references

Signed-off-by: Wouter Termont <[email protected]>

Author: woutermont

protocol.html

@@ -1556,6 +1556,8 @@ <h3 property="schema:name">Informative References</h3>
                     <dt id="bib-solid-websockets-api">[SOLID-WEBSOCKETS-API]</dt>
                     <dd><a href="https://github.com/solid/solid-spec/blob/master/api-websockets.md" rel="cito:citesAsPotentialSolution"><cite>Solid WebSockets API</cite></a>. Nicola Greco; Dmitri Zagidulin; Ruben Verborgh.  W3C Solid Community Group. 17 June 2020. Unofficial Draft. URL: <a href="https://github.com/solid/solid-spec/blob/master/api-websockets.md">https://github.com/solid/solid-spec/blob/master/api-websockets.md</a></dd>
                     <dt id="bib-uaag20">[UAAG20]</dt>
+                    <dd><a href="https://www.unicode.org/versions/latest/" rel="cito:citesAsPotentialSolution"><cite>The Unicode Standard</cite></a>. The Unicode Consortium.  URL: <a href="https://www.unicode.org/versions/latest/">https://www.unicode.org/versions/latest/</a></dd>
+                    <dt id="bib-unicode">[UNICODE]</dt>
                     <dd><a href="https://www.w3.org/TR/UAAG20/" rel="cito:citesAsPotentialSolution"><cite>User Agent Accessibility Guidelines (UAAG) 2.0</cite></a>. James Allan; Greg Lowney; Kimberly Patch; Jeanne F Spellman.  W3C. 15 December 2015. W3C Note. URL: <a href="https://www.w3.org/TR/UAAG20/">https://www.w3.org/TR/UAAG20/</a></dd>
                     <dt id="bib-wai-aria-1.2">[WAI-ARIA-1.2]</dt>
                     <dd><a href="https://www.w3.org/TR/wai-aria-1.2/" rel="cito:citesAsPotentialSolution"><cite>Accessible Rich Internet Applications (WAI-ARIA) 1.2</cite></a>. Joanmarie Diggs; James Nurthen; Michael Cooper.  W3C. 2 March 2021. W3C Candidate Recommendation. URL: <a href="https://www.w3.org/TR/wai-aria-1.2/">https://www.w3.org/TR/wai-aria-1.2/</a></dd>