Update version numbers

Graal dropped support for Java 8 and trying Tomcat 10.1 also causes
problems, so move up to 11 for the example script.

modules/stuffed/pom.xml

@@ -29,8 +29,8 @@
  <properties>
  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  <mainClass>org.apache.catalina.startup.Tomcat</mainClass>
- <tomcat.version>10.0.14</tomcat.version>
- <!-- <tomcat.version>9.0.56</tomcat.version> -->
+ <tomcat.version>10.0.16</tomcat.version>
+ <!-- <tomcat.version>9.0.58</tomcat.version> -->
  </properties>
 
  <dependencies>
@@ -79,8 +79,8 @@
  <artifactId>maven-compiler-plugin</artifactId>
  <version>3.8.1</version>
  <configuration>
- <source>1.8</source>
- <target>1.8</target>
+ <source>11</source>
+ <target>11</target>
  </configuration>
  </plugin>
  <plugin>