[basic.scope.pdecl] Add missing \grammarterm markup

Author: jensmaurer

source/basic.tex

@@ -1206,7 +1206,7 @@
 
 \pnum
 The locus of a \grammarterm{concept-definition}
-is immediately after its concept-name\iref{temp.concept}.
+is immediately after its \grammarterm{concept-name}\iref{temp.concept}.
 \begin{note}
 The \grammarterm{constraint-expression} cannot use
 the \grammarterm{concept-name}.