Added U-blox SARA-R5xxx-00B and SARA-R5xxx-x1B cellular modules
Datasheet: https://content.u-blox.com/sites/default/files/SARA-R5_DataSheet_UBX-19016638.pdf
You can also see the system integration manual for additional documentation: https://www.u-blox.com/sites/default/files/SARA-R5_SysIntegrManual_UBX-19041356.pdf