Fix grammar in content/en/docs/concepts/cluster-administration/kubelet-garbage-collection.md

Author: bl-ue

content/en/docs/concepts/cluster-administration/kubelet-garbage-collection.md

@@ -44,7 +44,7 @@ Default is 85%.
 2. `image-gc-low-threshold`, the percent of disk usage to which image garbage collection attempts
 to free. Default is 80%.
 
-Users can customize garbage collection policy through the following kubelet flags:
+Users can customize the garbage collection policy through the following kubelet flags:
 
 1. `minimum-container-ttl-duration`, minimum age for a finished container before it is
 garbage collected. Default is 0 minute, which means every finished container will be garbage collected.
@@ -84,4 +84,3 @@ Including:
 
 See [Configuring Out Of Resource Handling](/docs/tasks/administer-cluster/out-of-resource/) for more details.
 
-