Update databricks-configs.md as we are changing defaults

[benc-db]

Making the alias defaults match existing aliases so as not to break existing user macro overrides

What are you changing in this pull request and why?

Had to make a change to config defaults so as to be non-breaking, so propagating to documentation.

Checklist

• I have reviewed the Content style guide so my content adheres to these guidelines.
• The topic I'm writing about is for specific dbt version(s) and I have versioned it according to the version a whole page and/or version a block of content guidelines.
• I have added checklist item(s) to this list for anything anything that needs to happen before this PR is merged, such as "needs technical review" or "change base branch."

[vercel]

@benc-db is attempting to deploy a commit to the dbt-labs Team on Vercel.

A member of the Team first needs to authorize it.