Changes in Lang Files Dashboard

Lang Path	Status	En Updates	PR
content/ja/examples/application/guestbook/redis-slave-deployment.yaml # Last Commit: 2019-05-20	en-file-no-longer-exists	Last update: 2021-01-19 Commit: Remove Master/Slave terminology from stateless application tutorial. 2021-01-19 Merge Commit: Merge pull request #26141 from jimangel/remove-redis-and-master-slave-terminology-2 2021-02-07 Commit: clean up too old comments for v1.9 or before in examples 2021-01-09 Merge Commit: Merge pull request #26023 from oke-py/remove-old-comment 2021-01-12