added missing spring version

Author: sterlp

example/pom.xml

@@ -88,6 +88,7 @@
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
+                <version>${spring-boot.version}</version>
             </plugin>
         </plugins>
     </build>

pom.xml

@@ -51,7 +51,7 @@
 
     <properties>
         <java.version>21</java.version>
-        <spring-modulith.version>1.2.4</spring-modulith.version>
+        <spring-boot.version>3.3.6</spring-boot.version>
         <maven.compiler.source>${java.version}</maven.compiler.source>
         <maven.compiler.target>${java.version}</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -72,7 +72,7 @@
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-dependencies</artifactId>
-                <version>3.3.6</version>
+                <version>${spring-boot.version}</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>