add shacl-c reference

Author: YoucTagh

shacl12-core/index.html

@@ -158,6 +158,12 @@
 						href: "https://w3c.github.io/data-shapes/shacl12-shacl-shacl/",
 						status: "ED",
 						publisher: "W3C",
+					},
+					"shacl12-shacl-c": {
+						title: "SHACL Compact Syntax",
+						href: "https://w3c.github.io/data-shapes/shacl-compact-syntax/",
+						status: "ED",
+						publisher: "W3C",
 					}
 				}
 			};
@@ -475,7 +481,7 @@ <h2>Document Outline</h2>
 			</p>
 			<p>
 				The syntax of SHACL is RDF.
-				The examples in this document use Turtle [[rdf12-turtle]], JSON-LD [[json-ld]] and SHACL-C.
+				The examples in this document use Turtle [[rdf12-turtle]], JSON-LD [[json-ld]] and SHACL-C [[shacl12-shacl-c]].
 				Other RDF serializations such as RDF/XML may be used in practice.
 				The reader should be familiar with basic RDF concepts [[rdf12-concepts]] such as triples.
 			</p>