update ruoyi-demo 增加 knife4j 依赖

ruoyi-demo/pom.xml

@@ -23,6 +23,11 @@
             <artifactId>ruoyi-common</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>com.github.xiaoymin</groupId>
+            <artifactId>knife4j-spring-boot-starter</artifactId>
+        </dependency>
+
     </dependencies>
 
 </project>