Update SWTBot 2021-06 contribution to 3.1.0 release

Change-Id: I5d227eeebbf6846df9548dfe476a1dfe863806f8
Signed-off-by: Patrick Tasse <patrick.tasse@gmail.com>
diff --git a/swtbot.aggrcon b/swtbot.aggrcon
index 599a260..91a706c 100644
--- a/swtbot.aggrcon
+++ b/swtbot.aggrcon
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="ASCII"?>
 <aggregator:Contribution xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:aggregator="http://www.eclipse.org/cbi/p2repo/2011/aggregator/1.1.0" label="SWTBot">
-  <repositories location="https://download.eclipse.org/technology/swtbot/milestones/2021-06-rc2/" description="SWTBot Contribution for 2021-06">
+  <repositories location="https://download.eclipse.org/technology/swtbot/releases/3.1.0/" description="SWTBot Contribution for 2021-06">
     <features name="org.eclipse.swtbot.ide.feature.group">
       <categories href="simrel.aggr#//@customCategories[identifier='Testing']"/>
     </features>