Move o.e.help.webapp to Java 21

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

Author: akurtakov

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

@@ -7,9 +7,9 @@ org.eclipse.jdt.core.compiler.annotation.nullable=org.eclipse.jdt.annotation.Nul
 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
@@ -101,7 +101,7 @@ 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.formatter.align_assignment_statements_on_columns=false
 org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=2147483647
 org.eclipse.jdt.core.formatter.align_selector_in_method_invocation_on_expression_first_line=true

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

@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %help_webapp_plugin_name
 Bundle-SymbolicName: org.eclipse.help.webapp;singleton:=true
-Bundle-Version: 3.11.700.qualifier
+Bundle-Version: 3.12.0.qualifier
 Bundle-Activator: org.eclipse.help.internal.webapp.HelpWebappPlugin
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
@@ -17,7 +17,7 @@ Export-Package: org.eclipse.help.internal.webapp;x-friends:="org.eclipse.ua.test
  org.eclipse.help.internal.webapp.servlet;x-friends:="org.eclipse.ua.tests,org.eclipse.ua.tests.doc",
  org.eclipse.help.internal.webapp.utils;x-friends:="org.eclipse.ua.tests",
  org.eclipse.help.webapp
-Bundle-RequiredExecutionEnvironment: JavaSE-17
+Bundle-RequiredExecutionEnvironment: JavaSE-21
 Import-Package: javax.servlet;version="3.1.0",
  javax.servlet.http;version="3.1.0"
 Bundle-ActivationPolicy: lazy

ua/org.eclipse.help.webapp/pom.xml

@@ -18,7 +18,7 @@
   </parent>
   <groupId>org.eclipse.help</groupId>
   <artifactId>org.eclipse.help.webapp</artifactId>
-  <version>3.11.700-SNAPSHOT</version>
+  <version>3.12.0-SNAPSHOT</version>
   <packaging>eclipse-plugin</packaging>
   <build>
     <plugins>