chore: fix README bullet formatting

[ci skip]

README.md

@@ -4,14 +4,14 @@ Extensible environment for interactive and reproducible computing
 
 <!-- metadata -->
 
-- **Category**: Apps
-- **Status**: 1
-- **Image**: `jupyter/datascience-notebook`
-- **Healthcheck**: No
-- **Backups**: No
-- **Email**: N/A
-- **Tests**: No
-- **SSO**: No
+* **Category**: Apps
+* **Status**: 1
+* **Image**: `jupyter/datascience-notebook`
+* **Healthcheck**: No
+* **Backups**: No
+* **Email**: N/A
+* **Tests**: No
+* **SSO**: No
 
 <!-- endmetadata -->