simplify regex from redirected log

Author: srivatsankrishnan

src/cloudai/workloads/megatron_bridge/slurm_command_gen_strategy.py

@@ -135,8 +135,7 @@ def _wrap_launcher_for_job_id_and_quiet_output(self, launcher_cmd: str) -> str:
             # Parse job id from Megatron-Bridge output (multiple possible formats)
             "",
             'JOB_ID=""',
-            'JOB_ID=$(grep -Eio "(^|[^a-zA-Z])Job id[: ]+[0-9]+" "$LOG" | '
-            'tail -n1 | grep -Eo "[0-9]+" | tail -n1 || true)',
+            'JOB_ID=$(grep -Eio "Job id[: ]+[0-9]+" "$LOG" | tail -n1 | grep -Eo "[0-9]+" | tail -n1 || true)',
             "",
             # Emit a canonical line for CloudAI to parse
             "",