docs(java): update ILP client artifact

[RaphDal]

Summary

• switch Java ILP client dependency to org.questdb:client:1.0.0
• update Java ILP example snippet to match new coordinates

[github-actions]

🤖 Component Converter Reminder

A component in src/components/ or src/theme/ was modified in this pull request.

We are creating markdown correspondents of every path (e.g. questdb.com/docs/quick-start → questdb.com/docs/quick-start/index.md) for LLM consumption.
If the component usage is shadowing useful content, it may need a converter for markdown output in convert-components.js.

Quick Check

• ✅ Content component (code, tables, data) → Add converter if not exists
• ❌ UI/visual component (styling, buttons, decorative) → No converter needed

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💡 This is a friendly reminder, not a blocker. Ignore if not applicable.

[github-actions]

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