docs: refresh RAGFlow community integration

[LauraGPT]

Summary

• refresh the RAGFlow community entry in both English and Chinese docs
• keep the self-hosted local FunASR/SenseVoice provider evidence from #16473
• add the merged Tongyi-Qianwen Fun-ASR-Flash speech-to-text support from #16844

Validation

• rg -n "RAGFlow" docs/community_projects.md docs/community_projects_zh.md
• git diff --check
• checked RAGFlow project, provider registration, supported-model docs, #16473, and #16844 links return HTTP 200

[gemini-code-assist]

Code Review

This pull request updates both the English and Chinese community projects documentation (docs/community_projects.md and docs/community_projects_zh.md) to reflect that RAGFlow now supports hosted Fun-ASR-Flash speech-to-text through the Tongyi-Qianwen provider, referencing the merged pull request #16844. There are no review comments, and I have no feedback to provide.

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