Fix gradle upgrade warnings

[bobbylight]

Fix warnings received when running with --warning-mode all:

Build file 'D:\dev\rjava\RText\build.gradle': line 414
Invocation of Task.project at execution time has been deprecated. This will fail with an error in Gradle 10. This API is incompatible with the configuration cache, which will become the only mode supported by Gradle in a future release. Consult the upgrading guide for further information: https://docs.gradle.org/9.2.1/userguide/upgrading_version_7.html#task_project
        at build_5vhwvpuz9454e36o9ln910dqe$_run_closure30$_closure85.doCall$original(D:\dev\rjava\RText\build.gradle:414)
        (Run with --stacktrace to get the full stack trace of this deprecation warning.)
Build file 'D:\dev\rjava\RText\build.gradle': line 415
Invocation of Task.project at execution time has been deprecated. This will fail with an error in Gradle 10. This API is incompatible with the configuration cache, which will become the only mode supported by Gradle in a future release. Consult the upgrading guide for further information: https://docs.gradle.org/9.2.1/userguide/upgrading_version_7.html#task_project
        at build_5vhwvpuz9454e36o9ln910dqe$_run_closure30$_closure85.doCall$original(D:\dev\rjava\RText\build.gradle:415)
        (Run with --stacktrace to get the full stack trace of this deprecation warning.)

The fix is to move the project.findProperty() calls to outside of the doLast block.