chg: [building information sharing communities] typo fixed

a.4-best-practices/content.tex

@@ -52,7 +52,7 @@
 	\end{itemize}
 	\item X-ISAC
 	\begin{itemize}
-		\item {\bf Bridging the gap} between the various sectorial and georgraphical ISACs
+		\item {\bf Bridging the gap} between the various sectorial and geographical ISACs
 		\item New, but ambitious initiative
 		\item Goal is to {\bf bootstrap the cross-sectorial sharing} along with building the infrastructure to enable sharing when needed
 	\end{itemize}