Fix typo in v0.3.0 release note

Signed-off-by: Gigon Bae <gbae@nvidia.com>
Signed-off-by: Chris Bridge <cbridge@partners.org>

Author: gigony

docs/source/release_notes/v0.3.0.md

@@ -18,7 +18,7 @@ This operator uses [Clara Viz](https://pypi.org/project/clara-viz/) to provide i
 
 This operator converts a volume image to surface mesh, in [STL file format](https://en.wikipedia.org/wiki/STL_(file_format)). Its API allows the client to control if smoothing needs to be applied, and if only keeping the largest connected component; the latter is useful when muliple disjoint segments are in a volume image, and the application needs to control if all or only the largest to be included in the output.
 
-### What's fixed or updated
+## What's fixed/updated
 
 - [The AI Spleen Segmentation](https://github.com/Project-MONAI/monai-deploy-app-sdk/tree/main/examples/apps/ai_spleen_seg_app) application is updated to include the STL conversion operator for surface mesh output
 - [The AI UNETR Segmentation](https://github.com/Project-MONAI/monai-deploy-app-sdk/blob/main/examples/apps/ai_unetr_seg_app/app.py) is updated to include the STL conversion operator, in lieu of the [DICOM Segmentation Writer](https://github.com/Project-MONAI/monai-deploy-app-sdk/blob/main/monai/deploy/operators/dicom_seg_writer_operator.py). This is because that the model outputs 13 labeled segments, exceeding the maximum of 8 supported by the [DICOM Segmentation Writer](https://github.com/Project-MONAI/monai-deploy-app-sdk/blob/main/monai/deploy/operators/dicom_seg_writer_operator.py)