updated REAMDE

README.md

@@ -8,9 +8,9 @@ Documentation can be found under https://micropython-ulab.readthedocs.io/en/late
 The source for the manual is in https://github.com/v923z/micropython-ulab/blob/master/docs/ulab-manual.ipynb,
 while developer help is in https://github.com/v923z/micropython-ulab/blob/master/docs/ulab.ipynb.
 
-Firmware for pyboard.v.1.1, as well as for PYBD_SF6 is updated once 
-in a while, and can be downloaded from https://github.com/v923z/micropython-ulab/releases, 
-otherwise, it can be compiled from the source by following the steps
+Firmware for pyboard.v.1.1 is updated once in a while, and can be downloaded 
+from https://github.com/v923z/micropython-ulab/releases, otherwise, it can be 
+compiled from the source by following the steps
 https://micropython-usermod.readthedocs.io/en/latest/usermods_05.html#compiling-our-module.