improve docs

Signed-off-by: Michael Crenshaw <[email protected]>

docs/operator-manual/upgrading/2.14-3.0.md

@@ -19,7 +19,10 @@ nested selectors were not applied. Starting in Argo CD 3.0, the field is ignored
 
 #### Detection
 
-To detect if you are impacted, you can run the following command:
+To detect if you are impacted, search your ApplicationSet controller logs for this string: `ignoring nested selector`.
+If there are no logs with this string, you are not impacted.
+
+Another way to detect if you are impacted is to run the following command:
 
 ```shell
 kubectl get appsets -o=json | jq -r '.items[] | select(
@@ -62,9 +65,9 @@ spec:
               elements:
               - another-key: 'another-value'
           - cluster: {}
--            selector:
--              matchLabels:
--                app: guestbook
+-           selector:
+-             matchLabels:
+-               app: guestbook
 
   template:
     metadata: