Bump io.openliberty.tools:liberty-gradle-plugin in /finish/ear

Bumps [io.openliberty.tools:liberty-gradle-plugin](https://github.com/OpenLiberty/ci.gradle) from 3.9.5 to 3.9.6.
- [Release notes](https://github.com/OpenLiberty/ci.gradle/releases)
- [Changelog](https://github.com/OpenLiberty/ci.gradle/blob/main/release.gradle)
- [Commits](OpenLiberty/ci.gradle@liberty-gradle-plugin-3.9.5...liberty-gradle-plugin-3.9.6)

---
updated-dependencies:
- dependency-name: io.openliberty.tools:liberty-gradle-plugin
  dependency-version: 3.9.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

finish/ear/build.gradle

@@ -17,7 +17,7 @@ buildscript {
         }
     }
     dependencies {
-        classpath 'io.openliberty.tools:liberty-gradle-plugin:3.9.5'
+        classpath 'io.openliberty.tools:liberty-gradle-plugin:3.9.6'
     }
 }