Other examples upgraded to Java 21

Author: szschaler

examples/problems/argumentation/pom.xml

@@ -49,8 +49,8 @@
 				<artifactId>maven-compiler-plugin</artifactId>
 				<version>3.0</version>
 				<configuration>
-					<source>11</source>
-					<target>11</target>
+					<source>21</source>
+					<target>21</target>
 				</configuration>
 			</plugin>
 			<plugin>

examples/problems/cra/META-INF/MANIFEST.MF

@@ -7,7 +7,7 @@ Bundle-Version: 1.0.0.qualifier
 Bundle-ClassPath: .
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
-Bundle-RequiredExecutionEnvironment: JavaSE-11
+Bundle-RequiredExecutionEnvironment: JavaSE-21
 Export-Package: 
  models.cra.fitness.architectureCRA,
  models.cra.fitness.architectureCRA.impl,

examples/problems/tsp/META-INF/MANIFEST.MF

@@ -7,7 +7,7 @@ Bundle-Version: 1.0.0.qualifier
 Bundle-ClassPath: .
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
-Bundle-RequiredExecutionEnvironment: J2SE-1.5
+Bundle-RequiredExecutionEnvironment: J2SE-21
 Export-Package: models.tsp.fitness.TSP,
  models.tsp.fitness.TSP.impl,
  models.tsp.fitness.TSP.util