build(deps): bump com.jfrog.artifactory from 5.2.5 to 6.0.3

Bumps com.jfrog.artifactory from 5.2.5 to 6.0.3.

---
updated-dependencies:
- dependency-name: com.jfrog.artifactory
  dependency-version: 6.0.3
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

build.gradle

@@ -1,7 +1,7 @@
 import com.lesfurets.gradle.*
 
 plugins {
-    id 'com.jfrog.artifactory' version '5.2.5'
+    id 'com.jfrog.artifactory' version '6.0.3'
     id 'groovy'
     id 'maven-publish'
     id 'java-library'