Fix type error in performance_profiling/pathology/train_evaluate_nvtx.py (#1416)

Fixes #1415 .

### Checks
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- [x] Avoid including large-size files in the PR.
- [ ] Clean up long text outputs from code cells in the notebook.
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- [ ] Ensure (1) hyperlinks and markdown anchors are working (2) use
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- [ ] Notebook runs automatically `./runner.sh -t <path to .ipynb file>`

Signed-off-by: KumoLiu <[email protected]>

Author: KumoLiu

performance_profiling/pathology/train_evaluate_nvtx.py

@@ -477,6 +477,9 @@ def main(cfg):
     # Save final metrics
     metric_summary["train_time_per_epoch"] = total_train_time / cfg["n_epochs"]
     metric_summary["total_time"] = t_end - t_start
+
+    # The type of the value in hparam_dict can only be one of bool, string, float, int, or None.
+    cfg["grid_shape"] = str(cfg["grid_shape"])
     writer.add_hparams(hparam_dict=cfg, metric_dict=metric_summary, run_name=log_dir)
     writer.close()
     logging.info(f"Metric Summary: {metric_summary}")