Update shacl12-rules/index.html

Co-authored-by: Robert David <9427084@gmail.com>

Author: afs

shacl12-rules/index.html

@@ -127,7 +127,7 @@
       <p>
         SHACL, the Shapes Constraint Language, is a language for describing the structure
         of RDF graphs.  SHACL introduces the notion of shapes that can specify constraints
-        on the structure of RDF nodes and edges.  graphs.
+        on the structure of RDF graphs.
       </p>
       <p>
         SHACL may be used for a variety of purposes such as validating, inferencing,