build(deps): Bump dubbo to 2.7.18 in sentinel-demo/sentinel-demo-apac…

…he-dubbo (#2923)

Bumps [dubbo](https://github.com/apache/dubbo) from 2.7.3 to 2.7.18.
- [Release notes](https://github.com/apache/dubbo/releases)
- [Changelog](https://github.com/apache/dubbo/blob/3.1/CHANGES.md)
- [Commits](apache/dubbo@dubbo-2.7.3...dubbo-2.7.18)

---
updated-dependencies:
- dependency-name: org.apache.dubbo:dubbo
  dependency-type: direct:production
...

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sentinel-demo/sentinel-demo-apache-dubbo/pom.xml

@@ -15,7 +15,7 @@
         <dependency>
             <groupId>org.apache.dubbo</groupId>
             <artifactId>dubbo</artifactId>
-            <version>2.7.3</version>
+            <version>2.7.18</version>
         </dependency>
 
         <!-- Dubbo provides qos plugin and is enable by default. -->