Update datafacilities.tex

Co-authored-by: wil <womullan@lsst.org>

datafacilities.tex

@@ -4,7 +4,7 @@ \subsection{Data Facilities} \label{sec:datafacilities}
 
 In this arrangement, the USDF will coordinate each processing {\em Campaign} and be the primary curation site, holding a copy of all raw, intermediate, and science-ready products from each production run of the Science Pipeline. The USDF will also be solely responsible for Prompt Processing.
 
-\subsubsection{US Data Facility} \label{sec:ukdf}
+\subsubsection{US Data Facility} \label{sec:usdf}
 
 \subsubsection{French Data Facility} \label{sec:frdf}