Theta-fs0 to Become Read-Only on October 30

As part of the theta-fs0 decommissioning plan, the file system will be mounted read-only on October 30, 2023, and will no longer be available starting January 1, 2024. Any jobs attempting to write to theta-fs0 on October 30 or later will fail. For more details, see: https://docs.alcf.anl.gov/theta/theta-decommissioning/