Bump org.apache.ftpserver:ftpserver-core from 1.2.0 to 1.2.1 (#139)

Bumps [org.apache.ftpserver:ftpserver-core](https://github.com/apache/mina-ftpserver) from 1.2.0 to 1.2.1.
- [Commits](https://github.com/apache/mina-ftpserver/compare/1.2.0...ftpserver-parent-1.2.1)

---
updated-dependencies:
- dependency-name: org.apache.ftpserver:ftpserver-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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dependencies.gradle

@@ -6,6 +6,6 @@ ext {
     djlVersion = '0.26.0'
 
     springIntegrationAws = 'org.springframework.integration:spring-integration-aws:3.0.8'
-    ftpServerCore = 'org.apache.ftpserver:ftpserver-core:1.2.0'
+    ftpServerCore = 'org.apache.ftpserver:ftpserver-core:1.2.1'
     mockServerNetty = 'org.mock-server:mockserver-netty:5.15.0'
 }