Fix default.beamer nocite location.

It must be inside a frame or it is ignored.

Improves on #10465. Obsoletes #10471.

Co-authored-by:  Thomas Hodgson <hello@twshodgson.net>

data/templates/default.beamer

@@ -168,9 +168,6 @@ $if(linestretch)$
 $endif$
 $body$
 
-$if(nocite-ids)$
-\nocite{$for(nocite-ids)$$it$$sep$, $endfor$}
-$endif$
 $if(natbib)$
 $if(bibliography)$
 $if(biblio-title)$
@@ -181,6 +178,9 @@ $else$
 $endif$
 $endif$
 \begin{frame}[allowframebreaks]{$biblio-title$}
+$if(nocite-ids)$
+  \nocite{$for(nocite-ids)$$it$$sep$, $endfor$}
+$endif$
   \bibliographytrue
   \bibliography{$for(bibliography)$$bibliography$$sep$,$endfor$}
 \end{frame}
@@ -189,6 +189,9 @@ $endif$
 $endif$
 $if(biblatex)$
 \begin{frame}[allowframebreaks]{$biblio-title$}
+$if(nocite-ids)$
+  \nocite{$for(nocite-ids)$$it$$sep$, $endfor$}
+$endif$
   \bibliographytrue
   \printbibliography[heading=none]
 \end{frame}