[WIP] Automate and fix deployment workflows for GitHub repository

[Claude]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Automatiser et corriger les workflows de déploiement</issue_title>
<issue_description>Suite à la discussion sur l'automatisation de mon dépôt GitHub, je souhaite que vous inspectiez mon dépôt DavidKRK.github.io et les workflows existants pour:

• Identifier les erreurs ou problèmes possibles dans les workflows déploy.yml et jekyll.yml.
• Proposer des améliorations pour automatiser les tâches de déploiement et de maintenance.
• Corriger les erreurs et optimiser les performances des workflows.

Veuillez créer un pull request avec les modifications nécessaires pour chaque dépôt que vous souhaitez inspecter.</issue_description>

Comments on the Issue (you are @claude[agent] in this section)

• Fixes Automatiser et corriger les workflows de déploiement #125

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[DavidKRK]

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