build: update the rc bits

Author: wenytang-ms

java-extension/com.microsoft.java.test.target/com.microsoft.java.test.tp.target

@@ -8,7 +8,7 @@
             <unit id="org.eclipse.sdk.feature.group" version="0.0.0"/>
             <unit id="org.mockito.mockito-core" version="0.0.0"/>
             <unit id="org.apache.commons.commons-io" version="0.0.0"/>
-            <repository location="https://download.eclipse.org/eclipse/updates/4.38-I-builds/"/>
+            <repository location="https://download.eclipse.org/eclipse/updates/4.38/"/>
         </location>
         <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
             <unit id="org.eclipse.xtext.xbase.lib" version="0.0.0"/>