fix: corrected two typos

slides/creators/Decorating_the_Workflow.tex

@@ -173,7 +173,7 @@ \subsection{The Configuration File}
   \end{question}
   \pause
   \begin{hint}
-  	The workflow is now able to take up the configuration - and will deduce all necesary input from the last rule requireing the \altverb{\{sample\}} wildcard.
+  	The workflow is now able to take up the configuration - and will deduce all necessary input from the last rule requiring the \altverb{\{sample\}} wildcard.
   \end{hint}
 %  \begin{docs}
 %  	  Input functions may be \altverb{lambda} functions (oneliners), too. The idea is that complex data mangling can be our-sourced to functions.