Correct some typos and rephrase some paragraphs in README.md

Author: ALABSTM

README.md

@@ -4,15 +4,14 @@
 
 ## Overview
 
-**STM32Cube** is a STMicroelectronics original initiative to ease developers' life by reducing efforts, time and cost.
+**STM32Cube** is a STMicroelectronics original initiative aimed at making life easier for developers by reducing effort, time and cost.
 
 **STM32Cube** covers the overall STM32 products portfolio. It includes a comprehensive embedded software platform delivered for each STM32 series.
    * The CMSIS modules (core and device) corresponding to the ARM(tm) core implemented in this STM32 product.
    * The STM32 HAL-LL drivers, an abstraction layer offering a set of APIs ensuring maximized portability across the STM32 portfolio.
-   * The BSP drivers of each evaluation, demonstration or nucleo board provided for this STM32 series.
-   * A consistent set of middleware libraries such as WPAN, ThreadX, FileX, USBX, NetDuoX, OpenBootloader, trustedfirmware, mbed-crypto, ...
-   * A full set of software projects (basic examples, applications, and demonstrations) for each board provided for this STM32 series.
-   * A development with three Toolchains and Compilers (IAR Embedded Workbench for ARM (EWARM), RealView Microcontroller Development Kit (MDK-ARM), and STM32CubeIDE).
+   * The BSP drivers of each evaluation, demonstration, or nucleo board provided for this STM32 series.
+   * A consistent set of middleware libraries such as LevelX, FileX, USBX, OpenBootloader...
+   * A full set of software projects (basic examples, applications, and demonstrations) for each board, each project developed in three flavors using three toolchains (EWARM, MDK-ARM, and STM32CubeIDE).
 
 Two models of publication are proposed for the STM32Cube embedded software:
    * The monolithic **MCU Package**: all STM32Cube software modules of one STM32 series are present (Drivers, Middleware, Projects, Utilities) in the repository (usual name **STM32Cubexx**, xx corresponding to the STM32 series).