docs(work): use workledger command name

Update work graph verification references from work to workledger.

work/northstars/NS-0003-hemplate-highlighting.md

@@ -28,8 +28,8 @@ Make `.heml` highlighting predictable in editors by defining the repo-owned high
 
 ## Verification
 
-- `work check`
-- `work list`
+- `workledger check`
+- `workledger list`
 - Later implementation slices should use repo-owned fixture/query tests where available; provider-specific visual/manual checks must name the editor and blocker.
 
 ## Non-goals