Update clause_3_references.adoc

Modify to reference the  CoverageJSON community standard issue #479

core/standard/sections/clause_3_references.adoc

@@ -14,7 +14,7 @@ The following normative documents contain provisions that, through reference in
 * [[[post,HTTP POST]]] Fielding, R., Reschke, J.: IETF RFC 7231, Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content, https://datatracker.ietf.org/doc/html/rfc7231#section-4.3.3[https://datatracker.ietf.org/doc/html/rfc7231#section-4.3.3]
 * [[[html5,html5]]] W3C: HTML5, W3C Recommendation, https://www.w3.org/TR/html5/[https://www.w3.org/TR/html5/]
 * [[[schema_org,schema_org]]]Schema.org: https://schema.org/docs/schemas.html[https://schema.org/docs/schemas.html]
-* [[[covjson,covjson]]] Blower, J., Riechert, M., Roberts, B.: Overview of the CoverageJSON format, https://www.w3.org/TR/covjson-overview/[https://www.w3.org/TR/covjson-overview/]
+* [[[OGC21-069r2,OGC 21-069r2]]] Little, C., Blower, J., Riechert, M., Kralidis, T., Davies, E., Olson, S., McGibbney, L.: OGC CoverageJSON Community Standard, https://docs.ogc.org/cs/21-069r2/21-069r2.html[https://docs.ogc.org/cs/21-069r2/21-069r2.html]
 * [[[rfc2413,rfc2413]]] Weibel, S., Kunze, J., Lagoze, C., Wolf, M.: IETF RFC 2413, Dublin Core Metadata for Resource Discovery, https://tools.ietf.org/rfc/rfc2413.txt[https://tools.ietf.org/rfc/rfc2413.txt]
 * [[[OGC06-103r4,OGC 06-103r4]]] Herring, J.: Simple Feature Access - Part 1: Common Architecture, http://portal.opengeospatial.org/files/?artifact_id=25355[http://portal.opengeospatial.org/files/?artifact_id=25355]
 * [[[OGC18-010r7,OGC 18-010r7]]] Lott, R.: Well-Known Text representation of Coordinate Reference Systems, http://docs.opengeospatial.org/is/18-010r7/18-010r7.html[http://docs.opengeospatial.org/is/18-010r7/18-010r7.html]