Update schema URL in docs

[nerixim]

Improve documentation

Link

refs #30 and https://pgtools.dev/latest/#configuration

Describe the problem

Documentation is sort of misleading, the correct link for the JSON Schema file is https://pgtools.dev/X.Y.Z/schema.json

Describe the improvement

init command would generate a config file with the correct link but it'd even better to keep docs in sync to avoid confusion.

[juleswritescode]

thanks man, fixed it here :)