fix: make conditional loop based on local isDead variable

[Zykem]

Description

Fixes the race condition in ambulance job. es_extended is setting ESX.PlayerData.dead in the same event. No waiting at all causes the conditional loop to not even start because ESX.PlayerData.dead is still false.

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Motivation

Improving ESX

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Implementation Details

Replacing the condition with a new one. (Existing local isDead variable)

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Usage Example

-- Add example usage here

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PR Checklist

• My commit messages and PR title follow the Conventional Commits standard.
• My changes have been tested locally and function as expected.
• My PR does not introduce any breaking changes.
• I have provided a clear explanation of what my PR does, including the reasoning behind the changes and any relevant context.

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