Fix stg_customers spelling

[dbirks]

What are you changing in this pull request and why?

Changing a misspelling of stg_cusutomers to stg_customers.

Checklist

• Review the Content style guide so my content adheres to these guidelines.
• For docs versioning, review how to version a whole page and version a block of content.
• Add a checklist item for anything that needs to happen before this PR is merged, such as "needs technical review" or "change base branch."

Thank you very much for the clear effort put in to this documentation by the way. It was very helpful in getting a demo project set up.

[welcome]

Hello!👋 Thanks for contributing to the dbt product documentation and opening this pull request! ✨
We use Markdown and some HTML to write the dbt product documentation. When writing content, you can use our style guide and content types to understand our writing standards and how we organize information in the dbt product docs.
We'll review your contribution and respond as soon as we can. 😄

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Name	Status	Preview	Comments	Updated (UTC)
docs-getdbt-com	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 15, 2023 5:13am

[mirnawong1]

hey @dbirks thank you for the great feedback and for opening this pr to address the typo. I've passed your kind words to our docs team and we're so glad to hear the quickstart was helpful ✨

we're looking forward to future contributions and hope you enjoy dbt!