Fix wrong param types, docs, and handles noise=None in scale_noise of FlowMatching schedulers #31121
  
    
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  | name: Build PR Documentation | |
| on: | |
| pull_request: | |
| paths: | |
| - "src/diffusers/**.py" | |
| - "examples/**" | |
| - "docs/**" | |
| concurrency: | |
| group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }} | |
| cancel-in-progress: true | |
| jobs: | |
| build: | |
| uses: huggingface/doc-builder/.github/workflows/build_pr_documentation.yml@main | |
| with: | |
| commit_sha: ${{ github.event.pull_request.head.sha }} | |
| pr_number: ${{ github.event.number }} | |
| install_libgl1: true | |
| package: diffusers | |
| languages: en ko zh ja pt | |
| custom_container: diffusers/diffusers-doc-builder |