Revert "Upgrade to {upload,download}-artifact@v4 for better performance" (#1396)

.github/workflows/build_macos.yaml

@@ -38,7 +38,7 @@ jobs:
         steps:
             - uses: actions/checkout@v3
 
-            - uses: actions/download-artifact@v4
+            - uses: actions/download-artifact@v3
               with:
                   name: webapp
 
@@ -151,7 +151,7 @@ jobs:
 
             # We exclude mac-universal as the unpacked app takes forever to upload and zip and dmg already contain it
             - name: Upload Artifacts
-              uses: actions/upload-artifact@v4
+              uses: actions/upload-artifact@v3
               with:
                   name: ${{ inputs.deploy-mode && 'packages.element.io' || 'macos' }}
                   path: |