Docs: Fix generate-types syntax

[giancarlosisasi]

This change fixes the typescript error in the example of splitting resolvers in multiple files. The books and addBooks must no be wrapped with a Queries or Mutation object.

Wrong (screenshot taken from the official docs)

Correct without Queries parent key (extracted from the working exampled linked at the end of the markdown file)

[addisonlynch]

PRs for new data sources are welcome

[hliebert]

I’m relatively new to python, if you could give me a pointer on where to begin/what to work from I’ll have a go at implementing it.

[datatalking]

@hliebert This is something I was curious about as well. To start we should understand what data db.nomics.world add to what pandas-datareader other data sources does not have?

I'm working on a similar project but it has a built in database and financial planning functions that I need to add data feeds to and pandas-datareader is where I find most support.