[releng] Docker snapshots now require Java17, downgrade Docker version

Change-Id: I14df686bc1a601187b77184fb402a48cd32d040f

Author: jonahgraham

releng/org.eclipse.cdt.target/cdt.target

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde version="3.8"?>
-<target name="cdt" sequenceNumber="120">
+<target name="cdt" sequenceNumber="121">
 	<locations>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
 			<repository location="https://download.eclipse.org/cbi/updates/license/"/>
@@ -19,7 +19,7 @@
 			<unit id="org.eclipse.egit.feature.group" version="0.0.0"/>
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
-			<repository location="https://download.eclipse.org/linuxtools/updates-docker-nightly/"/>
+			<repository location="https://download.eclipse.org/linuxtools/update-2022-06-docker-rc2"/>
 			<unit id="org.eclipse.linuxtools.docker.feature.feature.group" version="0.0.0"/>
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">