[BUG] submodule sync failing with cmake json parse error

[jlowe]

The submodule sync job is failing with this cmake error:

[2024-07-24T11:33:27.796Z] [INFO]      [exec] CMake Error at /home/jenkins/agent/workspace/jenkins-spark-rapids-jni_submodule-sync-dev-3471/target/libcudf/cmake-build/_deps/rapids-cmake-src/rapids-cmake/cpm/detail/pinning_write_file.cmake:278 (string):
[2024-07-24T11:33:27.796Z] [INFO]      [exec]   string sub-command JSON failed parsing json string: * Line 145, Column 4
[2024-07-24T11:33:27.796Z] [INFO]      [exec] 
[2024-07-24T11:33:27.796Z] [INFO]      [exec]     Missing ',' or '}' in object declaration
[2024-07-24T11:33:27.796Z] [INFO]      [exec] 
[2024-07-24T11:33:27.796Z] [INFO]      [exec]   .
[2024-07-24T11:33:27.796Z] [INFO]      [exec] Call Stack (most recent call first):
[2024-07-24T11:33:27.796Z] [INFO]      [exec]   /home/jenkins/agent/workspace/jenkins-spark-rapids-jni_submodule-sync-dev-3471/target/libcudf/cmake-build/_deps/rapids-cmake-src/rapids-cmake/cpm/detail/pinning_root_dir_hook.cmake:29 (rapids_cpm_pinning_write_file)
[2024-07-24T11:33:27.796Z] [INFO]      [exec]   /home/jenkins/agent/workspace/jenkins-spark-rapids-jni_submodule-sync-dev-3471/target/libcudf/cmake-build/_deps/rapids-cmake-src/rapids-cmake/cpm/generate_pinned_versions.cmake:102 (include)
[2024-07-24T11:33:27.796Z] [INFO]      [exec]   CMakeLists.txt:DEFERRED

[jlowe]

Filed rapidsai/cudf#16384.

[ttnghia]

This issue should already be fixed in rapids-cmake.