Update to use Orbit 2025-12.

Author: merks

org.eclipse.mylyn-target/org.eclipse.mylyn.target.target

@@ -73,7 +73,7 @@
 			<unit id="org.apache.commons.io" version="2.8.0.v20210415-0900"/>
 		</location>
 		<location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
-			<repository location="https://download.eclipse.org/tools/orbit/simrel/orbit-aggregation/2025-09/"/>
+			<repository location="https://download.eclipse.org/tools/orbit/simrel/orbit-aggregation/2025-12/"/>
 			<unit id="org.glassfish.hk2.osgi-resource-locator" version="0.0.0"/>
 			<unit id="org.apache.commons.lang3" version="0.0.0"/>
 			<unit id="org.apache.commons.logging" version="0.0.0"/>