Update PLAUSIBLE_KEY env. name

app.py

@@ -406,13 +406,13 @@ with gr.Blocks(title="Plausible Analytics Dashboard", theme=gr.themes.Soft()) as
         2. **Set environment variable:**
            ```bash
            # Windows
-           set PLAUSIBLE_API_KEY=your-key-here
+           set PLAUSIBLE_KEY=your-key-here
            
            # Mac/Linux
-           export PLAUSIBLE_API_KEY=your-key-here
+           export PLAUSIBLE_KEY=your-key-here
            
            # Or create .env file:
-           echo "PLAUSIBLE_API_KEY=your-key-here" > .env
+           echo "PLAUSIBLE_KEY=your-key-here" > .env
            ```
         
         2. **Install dependencies:**