[Version Management] Update get-started.mdx

[ngayerie]

SPM-2724

[hyperlint-ai]

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PR Change Summary

Updated the get-started documentation for version management to clarify version deletion and management processes.

• Added a section explaining that specific versions cannot be deleted in Version Management.
• Clarified that versions are immutable to ensure tracking and rollback capabilities.
• Introduced the option to create a new version by cloning the previous configuration.

Modified Files

• src/content/docs/version-management/get-started.mdx

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[github-actions]

Preview URL: https://51ddb7f9.preview.developers.cloudflare.com
Preview Branch URL: https://ngayerie-patch-13.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/version-management/get-started/	https://ngayerie-patch-13.preview.developers.cloudflare.com/version-management/get-started/