Use milestone build JustJ that now includes jdk.jfr

Author: merks

releng/org.eclipse.oomph.parent/tp/org.eclipse.oomph.tp.target

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde version="3.8"?>
-<target name="Generated from Oomph" sequenceNumber="160">
+<target name="Generated from Oomph" sequenceNumber="161">
   <locations>
     <location includeAllPlatforms="false" includeConfigurePhase="true" includeMode="planner" includeSource="true" type="InstallableUnit">
       <unit id="org.apache.commons.collections" version="3.2.2"/>
@@ -26,7 +26,7 @@
       <repository location="https://download.eclipse.org/tm4e/releases/latest"/>
       <repository location="https://download.eclipse.org/technology/swtbot/releases/4.2.1"/>
       <repository location="https://download.eclipse.org/tools/orbit/simrel/orbit-aggregation/nightly/latest"/>
-      <repository location="https://download.eclipse.org/justj/jres/21/updates/nightly/latest"/>
+      <repository location="https://download.eclipse.org/justj/jres/21/updates/milestone/latest"/>
       <repository location="https://download.eclipse.org/webtools/downloads/drops/R3.39.0/S-3.39RC2-20250902093744/repository"/>
       <repository location="https://download.eclipse.org/eclipse/updates/4.38-I-builds"/>
     </location>