refactor: Move pluginManagement from dubbo-examples to dubbo-quickstart-example

Keep spring-boot-maven-plugin version management closer to where it is used.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: fishtailfu

dubbo-examples/dubbo-quickstart-example/pom.xml

@@ -17,8 +17,16 @@
         <module>dubbo-quickstart-provider</module>
         <module>dubbo-quickstart-consumer</module>
     </modules>
-
     <build>
+        <pluginManagement>
+            <plugins>
+                <plugin>
+                    <groupId>org.springframework.boot</groupId>
+                    <artifactId>spring-boot-maven-plugin</artifactId>
+                    <version>${spring-boot-maven-plugin.version}</version>
+                </plugin>
+            </plugins>
+        </pluginManagement>
         <plugins>
             <plugin>
                 <groupId>org.springframework.boot</groupId>

dubbo-examples/pom.xml

@@ -58,16 +58,4 @@
             <version>${slf4j.version}</version>
         </dependency>
     </dependencies>
-
-    <build>
-        <pluginManagement>
-            <plugins>
-                <plugin>
-                    <groupId>org.springframework.boot</groupId>
-                    <artifactId>spring-boot-maven-plugin</artifactId>
-                    <version>${spring-boot-maven-plugin.version}</version>
-                </plugin>
-            </plugins>
-        </pluginManagement>
-    </build>
 </project>