[releng] Update to Sirius 6.4.0 official release

Change-Id: Iea1e0659d6053f5f3be67149dd0db7c7d665b087
Signed-off-by: Wayne Beaton <wayne.beaton@eclipse-foundation.org>
Signed-off-by: Philippe DUL <philippe.dul@thalesgroup.com>
diff --git a/releng/org.eclipse.emf.diffmerge.target/org.eclipse.emf.diffmerge.target.target b/releng/org.eclipse.emf.diffmerge.target/org.eclipse.emf.diffmerge.target.target
index a4bf75c..ed2bcc8 100644
--- a/releng/org.eclipse.emf.diffmerge.target/org.eclipse.emf.diffmerge.target.target
+++ b/releng/org.eclipse.emf.diffmerge.target/org.eclipse.emf.diffmerge.target.target
@@ -33,7 +33,7 @@
     </location>
     <location includeMode="slicer" includeAllPlatforms="false" includeSource="false" includeConfigurePhase="false" type="InstallableUnit">
       <unit id="org.eclipse.sirius.specifier.feature.group" version="0.0.0"/>
-      <repository location="https://download.eclipse.org/sirius/updates/stable/6.4.0-S20200921-043506/2020-06"/>
+      <repository location="https://download.eclipse.org/sirius/updates/releases/6.4.0/2020-06"/>
     </location>
   </locations>
-</target>
\ No newline at end of file
+</target>
diff --git a/releng/org.eclipse.emf.diffmerge.target/org.eclipse.emf.diffmerge.target.tpd b/releng/org.eclipse.emf.diffmerge.target/org.eclipse.emf.diffmerge.target.tpd
index e37acbf..f87babb 100644
--- a/releng/org.eclipse.emf.diffmerge.target/org.eclipse.emf.diffmerge.target.tpd
+++ b/releng/org.eclipse.emf.diffmerge.target/org.eclipse.emf.diffmerge.target.tpd
@@ -27,6 +27,6 @@
 	org.eclipse.gmf.runtime.notation.feature.group lazy
 	com.google.guava lazy
 }
-location "https://download.eclipse.org/sirius/updates/stable/6.4.0-S20200921-043506/2020-06" {
+location "https://download.eclipse.org/sirius/updates/releases/6.4.0/2020-06" {
 	org.eclipse.sirius.specifier.feature.group lazy
 }