Update [VoicePipeline] process diagram update

[EnggQasim]

Update [VoicePipeline] process diagram update

graph LR
    %% Input
    A["🎤 Audio Input"] --> |"Captured Speech"| B["📝 Transcribe (Speech-to-Text)"]

    %% Voice Pipeline
    subgraph Voice_Pipeline ["🔁 AI Processing Pipeline"]
        direction TB
        B --> |"Converted Text"| C["🤖 AI Agent"]:::highlight
        C --> |"Processed Response"| D["🔊 Text-to-Speech 🎙️"]
    end

    %% Output
    D --> |"Generated Speech"| E["🎧 Audio Output"]

    %% Custom styling
    classDef highlight fill:#ffcc66,stroke:#333,stroke-width:1px,font-weight:700;

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@rm-openai pls review it

[rm-openai]

thanks for the PR but I think the diagram is better as is (simpler and easier to grok)