Missing flight-data.csv

[Slide 12](https://www.owencampbell.me.uk/sql_python_tutorial/chapters/12/) link for flight-data.csv 404's

Found flight-data.csv [here](https://github.com/meatballs/sql_python_notebooks/blob/da330638f5c5bc4b6c3c5df1a0ed0a6a38dcbf43/flight-data.csv?raw=true)