update porm.xml

Author: shawnwangnih

pom.xml

@@ -237,7 +237,7 @@
         <dependency>
             <groupId>org.apache.tomcat.embed</groupId>
             <artifactId>tomcat-embed-core</artifactId>
-            <version>11.0.15</version>
+            <version>11.0.18</version>
         </dependency>
 
         <dependency>