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] <[email protected]>

.github/workflows/ci-locks.yml

@@ -92,7 +92,7 @@ jobs:
         tox -e ${{ matrix.lock }} -- --platform osx-64 --platform win-64
 
     - name: "Upload lock artifacts"
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: lock-artifacts
         path: ${{ github.workspace }}/requirements/locks/${{ matrix.lock }}*.txt

.github/workflows/ci-wheels.yml

@@ -72,7 +72,7 @@ jobs:
         UDUNITS2_XML_PATH: ${{ matrix.xml_path }}
         CIBW_ENVIRONMENT_PASS_LINUX: UDUNITS2_INCDIR UDUNITS2_LIBDIR UDUNITS2_XML_PATH
 
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         name: pypi-artifacts
         path: ${{ github.workspace }}/wheelhouse/*.whl
@@ -91,7 +91,7 @@ jobs:
       run: |
         pipx run build --sdist 
 
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         name: pypi-artifacts
         path: ${{ github.workspace }}/dist/*.tar.gz