Update TryGhost/action-deploy-theme action to v1.5.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
TryGhost/action-deploy-theme	action	minor	v1.4.1 -> v1.5.0

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Release Notes

TryGhost/action-deploy-theme

### [`v1.5.0`](https://togithub.com/TryGhost/action-deploy-theme/releases/v1.5.0) [Compare Source](https://togithub.com/TryGhost/action-deploy-theme/compare/v1.4.1...v1.5.0) - ✨ Added `working-directory` parameter

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Configuration

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