Remove reference to specific version (1.1) in appendix A

VOTable.tex

@@ -2351,7 +2351,7 @@ \subsection{Differences Between Versions 1.4 and 1.5}
 %\em\fg{DarkBlue}
 \section{Possible VOTable extensions}
 The definitions enclosed in this appendix
-are {\bf not} part of VOTable 1.1, but are considered as candidates
+are {\bf not} part of the VOTable standard, but are considered as candidates
 for VOTable improvements.
 %This section is a short explanation on how Astrores defines
 %the set of parameters and fields which can be qualified for a query --