Fix code example

[bessarabov]

The current code example produces error:

root@d1716cafa3fb:/app# cat script.py
import aerospike
import pprint

digest = aerospike.calc_digest("test", "demo", 1 )
pp.pprint(digest)
root@d1716cafa3fb:/app# python script.py
Traceback (most recent call last):
  File "/app/script.py", line 5, in <module>
    pp.pprint(digest)
    ^^
NameError: name 'pp' is not defined
root@d1716cafa3fb:/app#

With this fix it works:

root@d1716cafa3fb:/app# cat script.py
import aerospike
import pprint as pp

digest = aerospike.calc_digest("test", "demo", 1 )
pp.pprint(digest)
root@d1716cafa3fb:/app# python script.py
bytearray(b'\xb7\xf4\xb88\x89\xe2\xdag\xdeh>\x1d\xf6\x91\x9a\x1e\xac\xc4F\xc8')
root@d1716cafa3fb:/app#