Bump actions/upload-artifact from 3 to 4

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v3...v4)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/build.yml

@@ -78,7 +78,7 @@ jobs:
         shell: bash
 
       - name: Upload cpymad wheels
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: dist-linux
           path: dist
@@ -151,7 +151,7 @@ jobs:
       - run: .github/build/windows/cpymad.sh src/MAD-X/dist 3.12
 
       - name: Upload cpymad wheels
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: dist-windows
           path: dist
@@ -259,7 +259,7 @@ jobs:
           DYLD_LIBRARY_PATH=$LIBDIR delocate-listdeps --all dist/*.whl
 
       - name: Upload cpymad wheels
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: dist-macos
           path: dist