add callout for net new snapshots

[mirnawong1]

Adding a callout to snapshot config page to clarify the new yaml config for net new snapshots. exisitng config snapshots can continue using config block, however added guidance on what to do if they want to migrate to new yaml spec.

Resolves #6374

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🚀 Deployment available! Here are the direct links to the updated files:

• https://docs-getdbt-com-git-net-new-snapshots-dbt-labs.vercel.app/docs/build/snapshots
• https://docs-getdbt-com-git-net-new-snapshots-dbt-labs.vercel.app/docs/dbt-versions/core-upgrade/06-upgrading-to-v1.9
• https://docs-getdbt-com-git-net-new-snapshots-dbt-labs.vercel.app/reference/snapshot-configs

[vercel]

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Name	Status	Preview	Updated (UTC)
docs-getdbt-com	✅ Ready (Inspect)	Visit Preview	Dec 3, 2024 6:32pm

[graciegoheen]

I think the original issue Doug opened was about new snapshots configs (like dbt_valid_to_current and snapshot_meta_column_names) not the "new YAML" spec - can we adjust this PR accordingly?

[mirnawong1]

I think the original issue Doug opened was about new snapshots configs (like dbt_valid_to_current and snapshot_meta_column_names) not the "new YAML" spec

thanks @graciegoheen , i did meet with @dbeatty10 last week and thought he meant the new yaml spec. will loop Doug to confirm to make sure before i make further changes.

[dbeatty10]

This looks great @mirnawong1 ! 🤩

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What do you think about linking to this section wherever we say "If applying them to existing snapshots, you'll need to migrate over" ?

[dbeatty10]

🚀