sb2nov: fix PublicationEntry journal templating (#36)

rendercv/themes/sb2nov/PublicationEntry.j2.tex

@@ -1,6 +1,6 @@
 \resumeSubheading
     {<<entry.title>>}{<<entry.date_string>>}
-    {\href{<<entry.doi_url>>}{<<entry.doi>>}}{}
+    {\href{<<entry.doi_url>>}{<<entry.doi>>} ((* if not entry.journal == "" *))(<<entry.journal>>)((* endif *))}{}
     \resumeItemListStart
         \resumeItem{}{\raggedright <<entry.authors|map("abbreviate_name")|map("make_it_nolinebreak")|join(", ")|make_it_bold(cv.name|abbreviate_name)|make_it_italic(cv.name|abbreviate_name)>> \par}
     \resumeItemListEnd