MIG-327: Update mig-log-reader command

Author: apinnick

modules/migration-using-mig-log-reader.adoc

@@ -11,10 +11,17 @@ You can use the migration log reader to display a single filtered view of all th
 
 .Procedure
 
-* Run the following command to display a single migration log:
+. Get the `mig-log-reader` pod:
 +
 [source,terminal]
 ----
-$ oc logs -f --selector logreader=mig -n openshift-migration -c color <1>
+$ oc -n openshift-migration get pods | grep log
 ----
-<1> You can use the `-c plain` option to display the log without colors.
+
+. Enter the following command to display a single migration log:
++
+[source,terminal]
+----
+$ oc -n openshift-migration logs -f <mig-log-reader-pod> -c color <1>
+----
+<1> The `-c plain` option displays the log without colors.