Merge pull request #51799 from dkarczmarski/ja-sync-43217

[ja] sync with PR 43217

Author: k8s-ci-robot

content/ja/docs/reference/glossary/workload.md

@@ -1,6 +1,6 @@
 ---
 title: ワークロード
-id: workloads
+id: workload
 date: 2019-02-13
 full_link: /docs/concepts/workloads/
 short_description: >