Build against 2021-09 simrel

Change-Id: I1f2fa1c18784db006a4012a9fe77d39eeb955a0f
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
Reviewed-on: https://git.eclipse.org/r/c/linuxtools/org.eclipse.linuxtools/+/183268
Tested-by: Linux Tools Bot <linuxtools-bot@eclipse.org>
diff --git a/releng/org.eclipse.linuxtools.target/linuxtools-e4.21.target b/releng/org.eclipse.linuxtools.target/linuxtools-e4.21.target
index 6260247..263e666 100644
--- a/releng/org.eclipse.linuxtools.target/linuxtools-e4.21.target
+++ b/releng/org.eclipse.linuxtools.target/linuxtools-e4.21.target
@@ -92,7 +92,7 @@
 <unit id="org.eclipse.lsp4e" version="0.0.0"/>
 <unit id="org.eclipse.tm4e.feature.feature.group" version="0.0.0"/>
 <unit id="org.eclipse.wildwebdeveloper.embedder.node.feature.feature.group" version="0.0.0"/>
-<repository location="https://download.eclipse.org/releases/2021-06/"/>
+<repository location="https://download.eclipse.org/releases/2021-09/"/>
 </location>
 <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 <unit id="org.eclipse.reddeer.eclipse.feature.feature.group" version="0.0.0"/>
@@ -111,4 +111,4 @@
 -Xmx512M</vmArgs>
 <programArgs>-consolelog</programArgs>
 </launcherArgs>
-</target>
+</target>
\ No newline at end of file