Fix np2 scaling factor (#198)

- I believe the previous scaling factor was result from misleading information from np2 datasheet

Author: cjsha

workflows/hardware/np2e/load-np2e.py

@@ -36,7 +36,7 @@
 
 #%% Neuropixels 2.0 Data
 bit_depth = 12
-scalar = 2.44141
+scalar = 3.05176
 offset = -(2 ** (bit_depth - 1)) * scalar
 recording = se.read_binary(os.path.join(data_directory,  f"np2-a-ephys_{suffix}.raw"), 
                            3e5,