[PC-1315] Portenta X8: Firmware Release Notes (#1488)

* Release notes page content

* Page content structure update

* Article structure update

* Release notes structure update

* Release note documentation update

* Headings testing

* Additional heading testing

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* Update content/hardware/04.pro/boards/portenta-x8/tutorials/14.x8-firmware-release-notes/x8-firmware-release-notes.md

Co-authored-by: martab1994 <[email protected]>

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Co-authored-by: TaddyHC <[email protected]>
Co-authored-by: jcarolinares <[email protected]>
Co-authored-by: martab1994 <[email protected]>

Author: 4 people

content/hardware/04.pro/boards/portenta-x8/essentials.md

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         Download the latest firmware for Portenta X8 (Recommended).
     </EssentialElement>
 
+<EssentialElement title="Firmware Release Notes" type="article" link="/tutorials/portenta-x8/x8-firmware-release-notes">
+        All available Portenta X8 firmware release notes.
+    </EssentialElement>
+
 
 </EssentialsColumn>

content/hardware/04.pro/boards/portenta-x8/tutorials/14.x8-firmware-release-notes/hero-banner.png

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+---
+title: '14. Portenta X8 Firmware Release Notes'
+difficulty: beginner
+tags: [Linux, containers, factories, foundries]
+description: 'This article contains release notes of the existing Portenta X8 firmwares.'
+author: Taddy Ho Chung
+hardware:
+  - hardware/04.pro/board/portenta-x8
+
+---
+
+# Firmware Release Notes
+
+The present document provides detailed release notes for each firmware version of the Portenta X8. Explore the changes, improvements, and fixes for the released firmware.
+
+## Hardware and Software Requirements
+
+Supported Device:
+
+- [Portenta X8](https://store.arduino.cc/portenta-x8)
+
+Compatible carriers with the supported device:
+
+- [Portenta Breakout board](https://store.arduino.cc/portenta-breakout)
+- [Portenta Max Carrier](http://store.arduino.cc/portenta-max-carrier)
+- [Portenta Hat Carrier](https://store.arduino.cc/products/portenta-hat-carrier)
+
+# Firmware Versions
+The following section highlights the critical updates and enhancements introduced in the latest firmware version. It presents the most significant progress and optimizations implemented to improve performance, enhance user experience, and strengthen security.
+
+## Latest Firmware Version: __746__
+
+The listing herein offers a glimpse into the Portenta X8 firmware's continuous improvement and enhancement. You can expect a concise overview of the integrated key new features, major bug fixes, and critical security patches to ensure the highest level of functionality and performance within the Portenta X8 system.
+
+* **New Features:**
+- Added support for the Portenta Hat Carrier
+- Added experimental support for Ditto
+
+* **Enhancements:**
+- Improved bridge implementation (X8H7)
+
+* **Bug Fixes:**
+- Patched _u-boot env_ accessibility in devel images
+- Patched CAN bus protocol
+
+* **Security Updates:**
+- Security patches and updates included in the most recent release.
+
+***__You can access the latest version of the firmware [here](https://downloads.arduino.cc/portentax8image/image-latest.tar.gz).__***
+
+## Available Firmware Versions
+
+Below is a list of all available firmware versions with their release notes.
+  
+### OS Image 746
+
+<details>
+  <summary><strong>OS Image 746: Release arduino-88.91</strong></summary>
+
+#### New Features
+  - Added the Portenta HAT Carrier support
+  - Added experimental support for Ditto
+
+#### Enhancements
+  - Improved bridge implementation (X8H7)
+
+#### Bug Fixes
+  - _u-boot env_ accessible in devel images
+  - Patches for CAN bus protocol
+
+#### Security Updates
+  - Security patches and updates to enhance protection.
+
+#### Additional Notes
+  - Based on [LmP v88](https://foundries.io/products/releases/88/). It is based on the Yocto manifest. For docker-compose apps, check out [here](https://github.com/arduino/portenta-containers/tree/release).
+
+</details>
+<br></br>
+
+
+### OS Image 719
+<details>
+  <summary><strong>OS Image 719: Release arduino-88.7</strong></summary>
+
+#### New Features
+  - Added PWM fan support
+  - Added Pika Spark support
+  - Experimental support for RPi v3.0 (imx708) (V4L2, I2C)
+  - Support Bayer bggr 10-bit in bsp, courtesy of NXP (Weiping Liu) (V4L2, GSTREAMER)
+
+#### Enhancements
+  - Improved RPi v1.3 (ov5647_mipi) and reaching 30fps (V4L2, I2C)
+  - Improved RPi v2.1 (imx219) (V4L2, I2C)
+
+#### Bug Fixes
+  - Patches CAN bus TX issues
+
+#### Additional Notes
+  - Based on [LmP v88](https://foundries.io/products/releases/88/). This is based on the Yocto manifest. For docker-compose apps, check out [here](https://github.com/arduino/portenta-containers/tree/release).
+
+</details>
+<br></br>
+
+For instructions on how to install or upgrade to the latest firmware version, you can use the [Portenta X8 Out-of-the-box](https://docs.arduino.cc/tutorials/portenta-x8/user-manual#out-of-the-box-experience) or [flash it manually](https://docs.arduino.cc/tutorials/portenta-x8/user-manual#update-using-uuu-tool) downloading the newest version directly from this [link](https://downloads.arduino.cc/portentax8image/image-latest.tar.gz).