Update README.md (#2816)

Author: yebai

README.md

@@ -14,12 +14,12 @@
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-> [!IMPORTANT]                                                                                                                                                                                                                   
-> Turing.jl is an open-source project developed primarily by academic researchers within grant-funded institutions. As a result, our capacity to triage issues and review contributions is limited by available resources.
+> [!IMPORTANT]                                                                                                                                                                                    
+> Turing.jl is an open-source project developed primarily by academic researchers within grant-funded institutions. As such, our capacity to triage issues and review contributions is necessarily limited.
 >
-> Organisations that rely on Turing.jl in commercial or industrial contexts are encouraged to support its development, either through financial contributions or direct code contributions.
+> Turing.jl’s preferred automatic differentiation backends are ForwardDiff.jl and Mooncake.jl, which are supported natively through the public API. Additional backends are available through DifferentiationInterface.
 >
-> If you are interested in contributing to the TuringLang codebase, the preferred approach is to draft a feature proposal and submit it for review. The TuringLang team will then indicate whether the proposal is accepted or rejected. Upon acceptance, contributors may proceed with implementing the proposed feature. Bug fixes and small changes, however, are typically submitted directly as pull requests.
+> If you are interested in contributing to the TuringLang codebase, we recommend first submitting a feature proposal for review. The TuringLang team will indicate whether the proposal is accepted, after which implementation may proceed. Bug fixes and small changes are typically submitted directly as pull requests. Reviewer privileges are reserved for individuals with a sustained record of substantive contributions to TuringLang or those explicitly invited by a team member.
 
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