Update model info [skip-ci] (#546)

Fixes # .

### Description
A few sentences describing the changes proposed in this pull request.

### Status
**Ready/Work in progress/Hold**

### Please ensure all the checkboxes:
<!--- Put an `x` in all the boxes that apply, and remove the not
applicable items -->
- [x] Codeformat tests passed locally by running `./runtests.sh
--codeformat`.
- [ ] In-line docstrings updated.
- [ ] Update `version` and `changelog` in `metadata.json` if changing an
existing bundle.
- [ ] Please ensure the naming rules in config files meet our
requirements (please refer to: `CONTRIBUTING.md`).
- [ ] Ensure versions of packages such as `monai`, `pytorch` and `numpy`
are correct in `metadata.json`.
- [ ] Descriptions should be consistent with the content, such as
`eval_metrics` of the provided weights and TorchScript modules.
- [ ] Files larger than 25MB are excluded and replaced by providing
download links in `large_file.yml`.
- [ ] Avoid using path that contains personal information within config
files (such as use `/home/your_name/` for `"bundle_root"`).

Signed-off-by: Yiheng Wang <[email protected]>

models/model_info.json

@@ -1264,7 +1264,7 @@
         "source": "https://api.ngc.nvidia.com/v2/models/nvidia/monaihosting/pancreas_ct_dints_segmentation/versions/0.4.5/files/pancreas_ct_dints_segmentation_v0.4.5.zip"
     },
     "brats_mri_axial_slices_generative_diffusion_v1.0.7": {
-        "checksum": "ac8cb0ce6b6a836e5eb9648de311386daf37fc3b",
+        "checksum": "3e738008b4d40ad6586aebbe2f54cbb2bf2f9571",
         "source": "https://api.ngc.nvidia.com/v2/models/nvidia/monaihosting/brats_mri_axial_slices_generative_diffusion/versions/1.0.7/files/brats_mri_axial_slices_generative_diffusion_v1.0.7.zip"
     },
     "pathology_nuclei_classification_v0.1.6": {