Change get_values to values method

[shantanuo]

I got an error hile trying to run this notebook.

Vector_Mapping_Python/Vectorial_Maps.ipynb

The error is same as mentioned here...

https://stackoverflow.com/questions/66324764/geting-error-int64index-object-has-no-attribute-get-values-what-am-i-doing

The fix is to change get_values() to only values like this...

index.get_values()[0]
to
index.values[0]

Please update your notebook.