Use correct title capitalization

tex/aps-dichalcogenides-superconductivity.tex

@@ -25,7 +25,7 @@
     Department of Physics, University of California,
     Riverside, Riverside, California 92521, USA}
 
-  \title{Superconductivity in Transition Metal Dichalcogenides}
+  \title{Superconductivity in transition metal dichalcogenides}
   \date{\today}
 
   \input{_abstract}