Bump tomcat-embed-core in /3-extensions/protocol/dubbo-samples-rest

Bumps tomcat-embed-core from 8.0.53 to 8.5.63.

---
updated-dependencies:
- dependency-name: org.apache.tomcat.embed:tomcat-embed-core
  dependency-type: direct:production
...

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Author: dependabot[bot]

3-extensions/protocol/dubbo-samples-rest/pom.xml

@@ -36,7 +36,7 @@
         <validation-api.version>1.1.0.Final</validation-api.version>
         <hibernate-validator.version>4.2.0.Final</hibernate-validator.version>
         <swagger.version>1.5.19</swagger.version>
-        <tomcat.version>8.0.53</tomcat.version>
+        <tomcat.version>8.5.63</tomcat.version>
         <spring-boot.version>1.5.13.RELEASE</spring-boot.version>
     </properties>