Changes in Lang Files Dashboard

Lang Path	Status	En Updates	PR
content/ja/case-studies/spotify/spotify-featured.svg # Last Commit: 2020-01-20	en-file-no-longer-exists	Last update: 2025-02-16 Commit: Add dark images for case studies 2025-02-16 Merge Commit: Merge pull request #49586 from sftim/20250128_home_page_dark_mode 2025-03-18 Commit: Change the backgrounds of logo iamges from gray to transparent 2021-04-11 Merge Commit: Merge pull request #27501 from shuuji3/make-logo-image-background-transparent 2021-04-11