chore: fix README bullet formatting

[ci skip]

README.md

@@ -4,14 +4,14 @@ The open-source Calendly alternative.
 
 <!-- metadata -->
 
-- **Category**: Apps
+* **Category**: Apps
-- **Status**:
+* **Status**:
-- **Image**: 3wordchant/calendso, 4, own
+* **Image**: 3wordchant/calendso, 4, own
-- **Healthcheck**: No
+* **Healthcheck**: No
-- **Backups**: No
+* **Backups**: No
-- **Email**: Yes
+* **Email**: Yes
-- **Tests**: No
+* **Tests**: No
-- **SSO**: N/A
+* **SSO**: N/A
 
 <!-- endmetadata -->