Update Orbit to permanent R url for 4.27

Author: SDawley

eclipse.platform.releng.prereqs.sdk/eclipse-sdk-prereqs.target

@@ -46,7 +46,7 @@
       <!-- This is the "normal" Orbit repository. During development on Bug 568936 this repo is the EBR (git)
            sourced bundles of Orbit from 2022-03. This is the sub-p2-repo of the 2022-03 recommended build.
            This is the repo that is expected to be updated on milestones based on Orbit deliveries. -->
-      <repository location="https://download.eclipse.org/tools/orbit/downloads/drops/S20230214193619/repository/"/>
+      <repository location="https://download.eclipse.org/tools/orbit/downloads/drops/R20230302014618/repository/"/>
     </location>
     <location includeAllPlatforms="true" includeMode="slicer" type="InstallableUnit">