Correct capitalization in 'Useful Links' section

Capitalizing section head like the rest of the document

Author: andyparkerson

docs/commands/fs/deploy.md

@@ -207,6 +207,6 @@ fab export  ws.Workspace/MyDataPipeline.DataPipeline -o C:\Users\myuser
 
 ---
 
-### Useful links
+### Useful Links
 
 - [Fabric CI/CD Library](https://microsoft.github.io/fabric-cicd/latest/)