Bump ch.qos.logback:logback-core in /dubbo-admin-server

Bumps [ch.qos.logback:logback-core](https://github.com/qos-ch/logback) from 1.2.8 to 1.2.13.
- [Commits](qos-ch/logback@v_1.2.8...v_1.2.13)

---
updated-dependencies:
- dependency-name: ch.qos.logback:logback-core
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

dubbo-admin-server/pom.xml

@@ -231,7 +231,7 @@
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-core</artifactId>
-            <version>1.2.8</version>
+            <version>1.2.13</version>
         </dependency>
         <dependency>
             <groupId>org.projectlombok</groupId>