Merge pull request #107 from ivoa-std/SebastienDerriere-patch-2

Update UCDlist.tex

Author: BaptisteCecconi

UCDlist.tex

@@ -56,7 +56,7 @@
 The process to maintain and enrich the UCD list of terms is standardized in   \citep{2019ivoa.spec.1007G}.
 It states that successive versions of the UCD1+ vocabulary are distributed in Endorsed Notes within the IVOA.
 
-The changes with respect to the version UCDList1.4 have been discussed in the request for modification (RFM) page on (\url{https://wiki.ivoa.net/twiki/bin/view/IVOA/UCDList_1-5_RFM}) within the IVOA Semantics WG and validated by the UCD science board.
+The changes with respect to the version UCDList1.5 have been discussed in the request for modification (RFM) page on (\url{https://wiki.ivoa.net/twiki/bin/view/IVOA/UCDList_1-6_RFM}) within the IVOA Semantics WG and validated by the UCD science board.
 Each addition, amendment, etc.  is discussed now using VEP-UCD available from the RFM page  inspired from the set-up of Vocabulary Enhancement VEP2.0 specification (\url{https://ivoa.net/documents/Vocabularies/20210525/index.html}). 
 VEP-UCD files are referenced from the RFM page and available for further details.
 \end{abstract}