Don't capitalize initial of list item, as suggested

Co-authored-by: Hans Olsson <HansOlsson@users.noreply.github.com>

chapters/inheritance.tex

@@ -242,7 +242,7 @@ \section{Modifications}\label{modifications}
 There are three kinds of constructs in the Modelica language in which modifications can occur:
 \begin{itemize}
 \item
-  Variable declarations
+  variable declarations
 \item
   Short class declarations
 \item