fix: update GitHub Actions to use non-deprecated versions

- Update upload-artifact from v3 to v4 (v3 deprecated Jan 2025)
- Update download-artifact from v3 to v4
- Update cache from v3 to v4 for consistency
- Fixes workflow failures due to deprecated actions

Resolves GitHub Actions error: 'deprecated version of actions/upload-artifact: v3'

Author: lluc

.github/workflows/build-executables.yml

@@ -83,7 +83,7 @@ jobs:
     # 5. Configuration cache Poetry
     - name: 💾 Load Cached Poetry Dependencies  
       id: cached-poetry-dependencies
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: .venv
         key: venv-${{ runner.os }}-${{ env.PYTHON_VERSION }}-${{ hashFiles('**/poetry.lock') }}
@@ -174,7 +174,7 @@ jobs:
 
     # 12. Upload de l'artifact  
     - name: 📤 Upload Build Artifact
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: ${{ matrix.artifact_name }}
         path: release/${{ matrix.artifact_name }}/
@@ -202,7 +202,7 @@ jobs:
     steps:
     # Télécharger tous les artifacts
     - name: 📥 Download All Artifacts
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
 
     # Créer les archives ZIP pour chaque plateforme
     - name: 📦 Create Release Archives