Update concept-invoice.md

Author: 851996006

articles/ai-services/document-intelligence/concept-invoice.md

@@ -186,6 +186,17 @@ See how data, including customer information, vendor details, and line items, is
 *See* our [Language Support—prebuilt models](language-support-prebuilt.md) page for a complete list of supported languages.
 
 ## Field extraction
+The Document Intelligence invoice model `prebuilt-invoice` extracts the following fields.
+
+::: moniker range="doc-intel-3.1.0"
+> [!div class="nextstepaction"]
+> [View samples on GitHub.](https://github.com/Azure-Samples/document-intelligence-code-samples/blob/v3.1(2023-07-31-GA)/Python(v3.1)/Prebuilt_model/sample_analyze_invoices.py)
+::: moniker-end
+
+::: moniker range="doc-intel-4.0.0"
+> [!div class="nextstepaction"]
+> [View samples on GitHub.](https://github.com/Azure-Samples/document-intelligence-code-samples/blob/main/Python(v4.0)/Prebuilt_model/sample_analyze_invoices.py)
+::: moniker-end
 
 |Name| Type | Description | Standardized output |
 |:-----|:----|:----|:----|