fix NOAA-OWP#180. IndexError: invalid index to scalar variable. issue introduced by h5netcdf==0.14.0

Author: aaraney

python/nwm_client/src/hydrotools/nwm_client/gcp.py

@@ -271,7 +271,7 @@ def get_DataFrame(
             df = ds[['reference_time', 'time', 'streamflow']].to_dataframe().reset_index()
 
             # Extract scale factor
-            scale_factor = ds['streamflow'].scale_factor[0]
+            scale_factor = ds['streamflow'].scale_factor
 
             # Scale data
             df.loc[:, 'streamflow'] = df['streamflow'].mul(scale_factor)