Update README.md

Author: winkj

README.md

@@ -35,6 +35,7 @@ All samples in this directory share the same format; as such, you can follow the
 |Name|Protocol|Description|
 |----|--------|-----------|
 |[SEN44_I2C_minimal_example](/SEN44_I2C_minimal_example)|I2C|Basic example for I2C|
+|[SEN44_I2C_pm_values_floating_point](/SEN44_I2C_pm_values_floating_point)|I2C|Read out PM values as floating point|
 |[SEN44_I2C_change_T_offset_example](/SEN44_I2C_change_T_offset_example)|I2C|Change T offset over I2C|
 |[SEN44_I2C_change_VOC_parameters_example](/SEN44_I2C_change_VOC_parameters_example)|I2C|Change VOC parameters over I2C|
 |[SEN44_SCD40_I2C_example](/SEN44_SCD40_I2C_example)|I2C|Example using SEN44 with SCD4x|