chore(docs): remove reference to backups for free plans (#46441)

## I have read the
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
file.

YES

## What kind of change does this PR introduce?

Docs update

## What is the current behavior?

Currently, the docs includes the following verbiage:

"We automatically back up all Free, Pro, Team, and Enterprise Plan
projects on a daily basis. You can find backups in the [Database >
Backups](https://supabase.com/dashboard/project/_/database/backups/scheduled)
section of the Dashboard."

This has been confusing for users on the Free plan since, although we
capture backups for free projects they are only available for paid
plans.

## What is the new behavior?

Removed reference of backups for free plans from docs.

## Additional context

Add any other context or screenshots.


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Documentation**
* Updated the database backups guide to clarify that daily scheduled
backups are available for Pro, Team, and Enterprise plan projects.

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apps/docs/content/guides/platform/backups.mdx

@@ -3,7 +3,7 @@ title: 'Database Backups'
 description: 'Learn about backups for your Supabase project.'
 ---
 
-We automatically back up all Free, Pro, Team, and Enterprise Plan projects on a daily basis. You can find backups in the [**Database** > **Backups**](/dashboard/project/_/database/backups/scheduled) section of the Dashboard.
+We automatically back up all Pro, Team, and Enterprise Plan projects on a daily basis. You can find backups in the [**Database** > **Backups**](/dashboard/project/_/database/backups/scheduled) section of the Dashboard.
 
 Pro Plan projects can access the last 7 days of daily backups. Team Plan projects can access the last 14 days of daily backups, while Enterprise Plan projects can access up to 30 days of daily backups. If you need more frequent backups, consider enabling [Point-in-Time Recovery](#point-in-time-recovery). We recommend that free tier plan projects regularly export their data using the [Supabase CLI `db dump` command](/docs/reference/cli/supabase-db-dump) and maintain off-site backups.