[Releng] Fix the associated site of the p2

Change-Id: I87af7a8489ba467b8d628a61789dd6652521e00e
Signed-off-by: Pauline DEVILLE <pauline.deville@cea.fr>
diff --git a/releng-model2doc/category/pom.xml b/releng-model2doc/category/pom.xml
index 9e5f7b0..33fcd97 100755
--- a/releng-model2doc/category/pom.xml
+++ b/releng-model2doc/category/pom.xml
@@ -43,7 +43,7 @@
 							<skipWebContentGeneration>true</skipWebContentGeneration>
 							<associateSites>
 								<!-- SysML Update site -->
-								<site>https://download.eclipse.org/modeling/mdt/papyrus/components/sysml16</site>
+								<site>https://download.eclipse.org/modeling/mdt/papyrus/components/sysml16/2021-12/</site>
 								<!-- GMF Notation update site -->
 								<site>https://download.eclipse.org/modeling/gmp/gmf-runtime/updates/releases/</site>
 							</associateSites>