fix: if statement in publications/single.html (#1715)

Fixes Hugo v0.71.1 unable to build site.

layouts/publication/single.html

@@ -11,7 +11,7 @@
     <p class="pub-abstract">{{ .Params.abstract | markdownify }}</p>
     {{ end }}
 
-    {{ if (.Params.publication_types) and (ne (index .Params.publication_types 0) "0") }}
+    {{ if and (.Params.publication_types) (ne (index .Params.publication_types 0) "0") }}
     <div class="row">
       <div class="col-md-1"></div>
       <div class="col-md-10">