[temp.dep.type] Fix list item continuation after recent addition.

This edit was missed in the application of P2996R13. The deletion of
the original "or" was not indicated in the paper (but is clearly
necessary).

Author: tkoeppe

source/templates.tex

@@ -5652,9 +5652,9 @@
 This includes an injected-class-name\iref{class.pre} of a class template
 used without a \grammarterm{template-argument-list}.
 \end{footnote}
-\item a \grammarterm{pack-index-specifier}, or
+\item a \grammarterm{pack-index-specifier},
 \item denoted by \tcode{decltype(}\grammarterm{expression}{}\tcode{)},
-where \grammarterm{expression} is type-dependent\iref{temp.dep.expr}.
+where \grammarterm{expression} is type-dependent\iref{temp.dep.expr}, or
 \item denoted by a \grammarterm{splice-type-specifier} in which either
 the \grammarterm{splice-specifier} or
 \grammarterm{splice-specialization-specifier}