Chore: update neo4j python driver to 6.0.0

[achantavy]

Tried it once, didn't work because read_transaction and write_transaction have been replaced with execute_read and execute_write. Need to do a find and replace at some point.

Additional note: when we do this, neo4j driver 4.0.0 will stop working with cartography, so other users who import cartography as a library will need to update.

Dependabot is starting to nag: https://github.com/cartography-cncf/cartography/pull/1972