Change stm32l432xx-hal to stm32l4xx-hal, as the former has been superceded by the latter

README.md

@@ -190,8 +190,8 @@ Also check the list of [STMicroelectronics board support crates][stm-bsc]!
 
 - [`stm32l151-hal`](https://crates.io/crates/stm32l151-hal) - ![crates.io](https://img.shields.io/crates/v/stm32l151-hal.svg)
 
-- [`stm32l432xx-hal`](https://crates.io/crates/stm32l432xx-hal) - ![crates.io](https://img.shields.io/crates/v/stm32l432xx-hal.svg)
-   - Has examples that can run on boards like the [Nucleo-L432KC] and similar boards
+- [`stm32l4xx-hal`](https://crates.io/crates/stm32l4xx-hal) - ![crates.io](https://img.shields.io/crates/v/stm32l4xx-hal.svg)
+   - Generic hal support for stm32l4 devices, has examples that can run on boards like the [Nucleo-L432KC] and similar boards
 
 [Nucleo-L432KC]: https://www.st.com/content/st_com/en/products/evaluation-tools/product-evaluation-tools/mcu-eval-tools/stm32-mcu-eval-tools/stm32-mcu-nucleo/nucleo-l432kc.html