Apply suggestion to docs/troubleshooting.md

docs/troubleshooting.md

@@ -23,8 +23,7 @@ Are all cert-manager pods in the `oas` namespace in the `READY` state ?
 Are there any `cm-acme-http-solver-*` pods still running, indicating that there
 are unfinished certificate requests ?
 
-    cluster$ kubectl -n oas-apps get pods | grep cm-acme-http-solver
-    cluster$ kubectl -n oas get pods | grep cm-acme-http-solver
+    cluster$ kubectl get pods --all-namespaces | grep cm-acme-http-solver
 
 Show the logs of the main `cert-manager` pod: