Update pom.xml

Upgraded java and spring boot version

starter_code/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.1.5.RELEASE</version>
+		<version>3.3.5</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>com.example</groupId>
@@ -16,7 +16,7 @@
 	<description>Demo project for Spring Boot</description>
 
 	<properties>
-		<java.version>1.8</java.version>
+		<java.version>21</java.version>
     	<maven-jar-plugin.version>3.1.1</maven-jar-plugin.version>
 	</properties>
 
@@ -29,10 +29,6 @@
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>
 		</dependency>
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-tomcat</artifactId>
-		</dependency>
 
 		<dependency>
 			<groupId>com.h2database</groupId>
@@ -44,12 +40,9 @@
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
+
 		<!-- https://mvnrepository.com/artifact/org.codehaus.mojo/tomcat-maven-plugin -->
-		<dependency>
-		    <groupId>org.codehaus.mojo</groupId>
-		    <artifactId>tomcat-maven-plugin</artifactId>
-		    <version>1.1</version>
-		</dependency>
+
 	</dependencies>
 
 	<build>