[ja] sync translated content

[mdn-bot]

Yari generated sync. Related upstream commits:

• mdn/content@a7da665
• mdn/content@cdf5beb

[github-actions]

Preview URLs

• /ja/docs/MDN/Guides
• /ja/docs/MDN/Tutorials

Flaws (15)

URL: /ja/docs/MDN/Guides
Title: 開発者ガイド
Flaw count: 9

• broken_links:
  • /ja/docs/Learn/HTML is a redirect
  • /ja/docs/Learn/Getting_started_with_the_web/HTML_basics is a redirect
  • /ja/docs/Learn/CSS is a redirect
  • /ja/docs/Learn/JavaScript is a redirect
  • /ja/docs/Web/Media/Audio_and_video_delivery is a redirect
  • and 4 more flaws omitted

---

URL: /ja/docs/MDN/Tutorials
Title: チュートリアル
Flaw count: 6

• broken_links:
  • /ja/docs/Learn/Getting_started_with_the_web is a redirect
  • /ja/docs/Learn/Getting_started_with_the_web/CSS_basics is a redirect
  • /ja/docs/Learn/JavaScript/First_steps is a redirect
  • /ja/docs/Learn/JavaScript/Building_blocks is a redirect
  • /ja/docs/Learn/Getting_started_with_the_web/JavaScript_basics is a redirect
  • and 1 more flaws omitted