gradle(deps): bump net.java.dev.jna:jna from 5.14.0 to 5.15.0

Bumps [net.java.dev.jna:jna](https://github.com/java-native-access/jna) from 5.14.0 to 5.15.0.
- [Changelog](https://github.com/java-native-access/jna/blob/master/CHANGES.md)
- [Commits](java-native-access/jna@5.14.0...5.15.0)

---
updated-dependencies:
- dependency-name: net.java.dev.jna:jna
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

headlessmc-jline/build.gradle

@@ -1,6 +1,6 @@
 dependencies {
     api project(':headlessmc-api')
     api 'org.jline:jline:3.26.3'
-    implementation 'net.java.dev.jna:jna:5.14.0'
+    implementation 'net.java.dev.jna:jna:5.15.0'
     // TODO: maybe also package jansi for testing?
 }