Fix capitalization of figure and flowchart refs.

book/sourdough-starter/sourdough-starter.tex

@@ -93,7 +93,7 @@ are completely lost when trying to scale it up.
 
 Making a sourdough starter is very easy, all you need
 is a little bit of patience. It is in fact so easy that it can be summarized
-in a simple flowchart~\ref{fig:sourdough-starter-process} The flour you should
+in a simple Flowchart~\ref{fig:sourdough-starter-process} The flour you should
 use to bootstrap your starter is ideally a whole flour.
 You could use whole-wheat, whole-rye, whole-spelt or
 any other flour you have. In fact gluten free flours such
@@ -140,7 +140,7 @@ I~like to use a glass and place another
 inverted one on top.
 
 Now an epic battle begins, as visualized in 
-figure~\ref{fig:sourdough-starter-microbial-war}. In one 
+Figure~\ref{fig:sourdough-starter-microbial-war}. In one 
 study~\cite{yeasts+biocontrol+agent} scientists have identified
 more than \num{150}~different yeast species living
 on a single leaf of a plant.