docs: update demo conversation to use correct dev server port (8080)

Author: ErikBjare

src/democonversations.ts

@@ -131,7 +131,7 @@ export const demoConversations: DemoConversation[] = [
       },
       {
         role: "assistant",
-        content: "To use the gptme web UI, you'll need to run gptme-server locally first:\n\n```shell\ngptme-server --cors-origin='<origin>'  # Replace <origin> with the web UI URL\n```\n\nThen you have two options for accessing the web UI:\n\n1. **Use the hosted version** at [chat.gptme.org](https://chat.gptme.org):\n   - Use `--cors-origin='https://chat.gptme.org'` when starting the server\n   - Click the 'Connect' button in the top-right corner\n   - Enter the server URL (default: http://127.0.0.1:5000)\n\n2. **Run the web UI locally**:\n   ```shell\n   git clone https://github.com/ErikBjare/gptme-webui\n   cd gptme-webui\n   npm install\n   npm run dev\n   ```\n   Then:\n   - Use `--cors-origin='http://localhost:5173'` when starting the server\n   - Open http://localhost:5173 in your browser\n   - Click 'Connect' and enter the server URL\n\nBoth options provide the same features, just choose what works best for you!",
+        content: "To use the gptme web UI, you'll need to run gptme-server locally first:\n\n```shell\ngptme-server --cors-origin='<origin>'  # Replace <origin> with the web UI URL\n```\n\nThen you have two options for accessing the web UI:\n\n1. **Use the hosted version** at [chat.gptme.org](https://chat.gptme.org):\n   - Use `--cors-origin='https://chat.gptme.org'` when starting the server\n   - Click the 'Connect' button in the top-right corner\n   - Enter the server URL (default: http://127.0.0.1:5000)\n\n2. **Run the web UI locally**:\n   ```shell\n   git clone https://github.com/ErikBjare/gptme-webui\n   cd gptme-webui\n   npm install\n   npm run dev\n   ```\n   Then:\n   - Use `--cors-origin='http://localhost:8080'` when starting the server\n   - Open http://localhost:8080 in your browser\n   - Click 'Connect' and enter the server URL\n\nBoth options provide the same features, just choose what works best for you!",
         timestamp: now.toISOString(),
       }
     ],