🌐 Update Japanese translation of `docs/ja/docs/index.md`

[ukwhatn]

Updated the Japanese landing page to match the latest English version.

Specifically, the following sections have been updated:

• add: Deon Pillsbury's review
• del: "uvicorn[standard]" installation command
• update: sync code example
• update: fastapi cli
• update: dependencies
• add: fastapi-slim

[tiangolo]

📝 Docs preview for commit 96d16d0f343a9d4983228e4fc96cb34a7a6ed08d at: https://15bc434c.fastapitiangolo.pages.dev

[ukwhatn]

I forgot to change the line to highlight, fixed.

[tiangolo]

📝 Docs preview for commit 6ae4a1988793dea9ff7722d3aded337b5d924134 at: https://26b3d500.fastapitiangolo.pages.dev

[tiangolo]

📝 Docs preview for commit eaae5a3380f871e8b4bc72908b91b6ff5fd5bf6c at: https://b9c5ddcc.fastapitiangolo.pages.dev

[urushio]

It seems to me to be an appropriate translation. However, I am concerned about the sections where the list items that should be indented are not indented. (Although they appear to be indented in Markdown) https://b9c5ddcc.fastapitiangolo.pages.dev/ja/#_9

[ukwhatn]

@urushio

I am concerned about the sections where the list items that should be indented are not indented. (Although they appear to be indented in Markdown) https://b9c5ddcc.fastapitiangolo.pages.dev/ja/#_9

This "Recap" section seems to be in the same position in the EN version. If it is not about this section, it would be appreciated if you could give more details.

[urushio]

@ukwhatn Sorry for the lack of explanation. Attached are screenshots.

[ukwhatn]

@urushio I see, understand! Thanks for your reply 🙏

Similar issues have occurred in past PRs (e.g., #11476 ), so it might be an error specific to the preview environment.

https://67d8c39a.fastapitiangolo.pages.dev/ja/#_9