examples: fix k8s config mistake (#3051)

Author: korniltsev

examples/grafana-agent-auto-instrumentation/ebpf/k8s/config.river

@@ -10,7 +10,7 @@ discovery.kubernetes "local_pods" {
 }
 
 discovery.relabel "specific_pods" {
-  targets = discovery.kubernetes.all_pods.targets
+  targets = discovery.kubernetes.local_pods.targets
   rule {
     action = "drop"
     regex = "Succeeded|Failed|Completed"
@@ -65,4 +65,4 @@ pyroscope.write "endpoint" {
     //  username = "<Grafana Cloud User>"
     //  password = "<Grafana Cloud Password>"
     // }
-}
+}