Move o.e.help.ui to Java 21

It requires it already transitively through o.e.help.base

Author: akurtakov

ua/org.eclipse.help.ui/.classpath

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-21"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
 	<classpathentry kind="src" path="src"/>
 	<classpathentry kind="output" path="bin"/>

ua/org.eclipse.help.ui/.settings/org.eclipse.jdt.core.prefs

@@ -10,9 +10,9 @@ org.eclipse.jdt.core.compiler.annotation.nullable.secondary=
 org.eclipse.jdt.core.compiler.annotation.nullanalysis=disabled
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=21
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
-org.eclipse.jdt.core.compiler.compliance=17
+org.eclipse.jdt.core.compiler.compliance=21
 org.eclipse.jdt.core.compiler.debug.lineNumber=generate
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
@@ -106,7 +106,7 @@ org.eclipse.jdt.core.compiler.problem.unusedTypeParameter=ignore
 org.eclipse.jdt.core.compiler.problem.unusedWarningToken=warning
 org.eclipse.jdt.core.compiler.problem.varargsArgumentNeedCast=warning
 org.eclipse.jdt.core.compiler.release=enabled
-org.eclipse.jdt.core.compiler.source=17
+org.eclipse.jdt.core.compiler.source=21
 org.eclipse.jdt.core.compiler.taskCaseSensitive=enabled
 org.eclipse.jdt.core.compiler.taskPriorities=NORMAL,HIGH,NORMAL,NORMAL
 org.eclipse.jdt.core.compiler.taskTags=TODO,FIXME,XXX,HELP

ua/org.eclipse.help.ui/META-INF/MANIFEST.MF

@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %help_system_plugin_name
 Bundle-SymbolicName: org.eclipse.help.ui; singleton:=true
-Bundle-Version: 4.7.200.qualifier
+Bundle-Version: 4.8.0.qualifier
 Bundle-Activator: org.eclipse.help.ui.internal.HelpUIPlugin
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
@@ -21,6 +21,6 @@ Require-Bundle: org.eclipse.help.base;bundle-version="[4.0.0,5.0.0)";visibility:
  org.eclipse.ui;bundle-version="[3.206.200,4.0.0)";visibility:=reexport,
  org.eclipse.core.runtime;bundle-version="[3.29.0,4.0.0)";visibility:=reexport,
  org.eclipse.ui.forms;bundle-version="[3.5.0,4.0.0)"
-Bundle-RequiredExecutionEnvironment: JavaSE-17
+Bundle-RequiredExecutionEnvironment: JavaSE-21
 Bundle-ActivationPolicy: lazy
 Automatic-Module-Name: org.eclipse.help.ui