fix headings (openvinotoolkit#15207)

docs/install_guides/configurations-for-intel-gna.md

@@ -1,18 +1,23 @@
 # Configurations for Intel® Gaussian & Neural Accelerator (GNA) with OpenVINO™ {#openvino_docs_install_guides_configurations_for_intel_gna}
 
+@sphinxdirective
+
+.. note:: On platforms where Intel® GNA is not enabled in the BIOS, the driver cannot be installed, so the GNA plugin uses the software emulation mode only.
 
-> **NOTE**: On platforms where Intel® GNA is not enabled in the BIOS, the driver cannot be installed, so the GNA plugin uses the software emulation mode only.
+@endsphinxdirective
 
-### Drivers and Dependencies
 
-Intel® GNA hardware requires a driver to be installed on the system.
+## Drivers and Dependencies
 
 @sphinxdirective
 
+Intel® GNA hardware requires a driver to be installed on the system.
+
 .. _gna guide:
 
 @endsphinxdirective
 
+
 ## Linux
 
 ### Prerequisites
@@ -21,31 +26,56 @@ Ensure that make, gcc, and Linux kernel headers are installed.
 
 ### Configuration steps
 
-1. Download [Intel® GNA driver for Ubuntu Linux 18.04.3 LTS (with HWE Kernel version 5.4+)](https://storage.openvinotoolkit.org/drivers/gna/)
-2. Run the sample_install.sh script provided in the installation package:
-   ```sh
-   prompt$ ./scripts/sample_install.sh
-   ```
+@sphinxdirective
+
+#. Download `Intel® GNA driver for Ubuntu Linux 18.04.3 LTS (with HWE Kernel version 5.4+) <https://storage.openvinotoolkit.org/drivers/gna/>`__
+#. Run the sample_install.sh script provided in the installation package:
+
+   .. code-block:: sh
+
+      prompt$ ./scripts/sample_install.sh
+
 
 You can also build and install the driver manually by using the following commands:
-```sh
-prompt$ cd src/
-prompt$ make
-prompt$ sudo insmod intel_gna.ko
-```
+
+.. code-block:: sh
+
+   prompt$ cd src/
+   prompt$ make
+   prompt$ sudo insmod intel_gna.ko
+
 
 To unload the driver:
-```sh
-prompt$ sudo rmmod intel_gna
-```
 
-@sphinxdirective
+.. code-block:: sh
+
+   prompt$ sudo rmmod intel_gna
+
 
 .. _gna guide windows:
 
 @endsphinxdirective
 
+
 ## Windows
 
 Intel® GNA driver for Windows is available through Windows Update.
 
+## What’s Next?
+
+@sphinxdirective
+
+Now you are ready to try out OpenVINO™. You can use the following tutorials to write your applications using Python and C++.
+
+Developing in Python:
+   * `Start with tensorflow models with OpenVINO™ <https://docs.openvino.ai/nightly/notebooks/101-tensorflow-to-openvino-with-output.html>`_
+   * `Start with ONNX and PyTorch models with OpenVINO™ <https://docs.openvino.ai/nightly/notebooks/102-pytorch-onnx-to-openvino-with-output.html>`_
+   * `Start with PaddlePaddle models with OpenVINO™ <https://docs.openvino.ai/nightly/notebooks/103-paddle-onnx-to-openvino-classification-with-output.html>`_
+
+Developing in C++:
+   * :doc:`Image Classification Async C++ Sample <openvino_inference_engine_samples_classification_sample_async_README>`
+   * :doc:`Hello Classification C++ Sample <openvino_inference_engine_samples_hello_classification_README>`
+   * :doc:`Hello Reshape SSD C++ Sample <openvino_inference_engine_samples_hello_reshape_ssd_README>`
+
+@endsphinxdirective
+