Update target platform to 4.28 I20230605-0440

Related issues:
- redhat-developer/vscode-java#3138
- eclipse-jdt/eclipse.jdt.core#934

Signed-off-by: Snjezana Peco <snjezana.peco@redhat.com>

org.eclipse.jdt.ls.target/org.eclipse.jdt.ls.tp.target

@@ -29,7 +29,7 @@
             <unit id="org.eclipse.jdt.source.feature.group" version="0.0.0"/>
             <unit id="org.eclipse.sdk.feature.group" version="0.0.0"/>
             <unit id="org.mockito.mockito-core" version="0.0.0"/>
-            <repository location="https://download.eclipse.org/eclipse/updates/4.28-I-builds/I20230511-1800/"/>
+            <repository location="https://download.eclipse.org/eclipse/updates/4.28-I-builds/I20230605-0440/"/>
         </location>
         <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
             <unit id="org.eclipse.xtext.xbase.lib" version="0.0.0"/>