fix(docs): dead links sourcing-data -> querying-data

[angristan]

Description

Some pages were recently moved (#28165 I think) from how-to/sourcing-data to how-to/querying-data but the references were not updated.

how-to/querying-data
├── page-query.md
├── running-queries-with-graphiql.md
├── static-query.md
├── use-static-query.md
└── using-gatsby-without-graphql.md
how-to/sourcing-data
├── headless-cms.md
├── sourcing-from-contentful.md
├── sourcing-from-databases.md
├── sourcing-from-drupal.md
├── sourcing-from-hosted-services.md
├── sourcing-from-json-or-yaml.md
├── sourcing-from-netlify-cms.md
├── sourcing-from-prismic.md
├── sourcing-from-private-apis.md
├── sourcing-from-the-filesystem.md
└── sourcing-from-wordpress.md

[wardpeet]

Thank you 🙏