K8SPSMDB-1344 Updated command output examples with the new size column

[nastena1606]

modified: docs/backup-tutorial.md
modified: docs/backups-delete.md
modified: docs/backups-ondemand.md

[Copilot]

Pull Request Overview

This PR updates documentation examples to reflect the addition of a new SIZE column in backup command outputs. The changes ensure the documentation examples accurately represent the current command line interface for MongoDB backup operations.

• Updated kubectl command output examples to include the new SIZE column
• Modified example data to show realistic backup sizes and updated timestamps
• Standardized command examples to include namespace specification

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
docs/backups-ondemand.md	Updated backup output example to include SIZE column with sample data
docs/backups-delete.md	Added namespace specification to kubectl commands
docs/backup-tutorial.md	Updated output example format and added SIZE column information

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