Describe the bug
The boards.txt entry for the L052K8Ux is missing but the L052K8Tx exists as a menu option. Is there a reason this wasn't included or should I add it in and submit a pull request? There looks to be a variant folder for this board but no entry. I'm designing a board using this chip and want to make sure there isn't a reason it cannot be used with the Arduino Core before moving forwards.

To Reproduce

Steps to reproduce the behavior:

1. Choose the "Generic STM32L0 series" for board.
2. Look at board part numbers.

Expected behavior
There should be an option for this part number.

Screenshots

Desktop:

• OS: Windows
• Arduino IDE version: 2.3.4
• STM32 core version: 2.10.1

Board:

• Name: Generic STM32L0 series