fix: remove broken midatronics links

Signed-off-by: Frederic Pillon <[email protected]>

Author: fpistm

Diff for: README.md

@@ -781,11 +781,11 @@ User can add a STM32 based board following this [wiki](https://github.com/stm32d
 | :green_heart:  | STM32L151CB | [RAK811 LoRa Tracker](https://www.rakwireless.com/en/) | *1.4.0* | [Wiki](https://github.com/stm32duino/Arduino_Core_STM32/wiki/Connectivities#lora) |
 | :green_heart:  | STM32L051C8 | [RHF76-052](https://lora-alliance.org/lora_products/rhf76-052/) | *1.7.0* | Basic support |
 
-### [Midatronics](https://midatronics.com/) boards
+### Midatronics boards
 
 | Status | Device(s) | Name | Release | Notes |
 | :----: | :-------: | ---- | :-----: | :---- |
-| :green_heart:  | STM32WB55CE | [SharkyMKR](https://midatronics.com/shop/development-boards/mkr-sharky-i/) | *1.7.0* |  |
+| :green_heart:  | STM32WB55CE | SharkyMKR | *1.7.0* |  |
 
 ### [SparkFun](https://www.sparkfun.com/) boards