Fix Python driver package (#33)

The mentioned package name was meant to be removed since 2.0 it's just
that no one took the time to deprecate it. 
Don't make our users' lives harder by guiding more of them towards the package that will maybe be deprecated in
the near future.

code/python/example.py

@@ -1,4 +1,4 @@
-# pip3 install neo4j-driver
+# pip3 install neo4j
 # python3 example.py
 
 from neo4j import GraphDatabase, basic_auth