Fix startupProbe behaviour changed

Signed-off-by: Shiming Zhang <wzshiming@foxmail.com>

pkg/kubelet/prober/worker.go

@@ -243,8 +243,9 @@ func (w *worker) doProbe() (keepGoing bool) {
 
 	if c.Started != nil && *c.Started {
 		// Stop probing for startup once container has started.
+		// we keep it running to make sure it will work for restarted container.
 		if w.probeType == startup {
-			return false
+			return true
 		}
 	} else {
 		// Disable other probes until container has started.