Bump actions/upload-artifact from 2 to 4

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 2 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v2...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/pypi.yaml

@@ -48,7 +48,7 @@ jobs:
           python examples/python/example_sdp.py 
 
       - name: Upload wheels
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: wheels
           path: dist
@@ -101,7 +101,7 @@ jobs:
           python examples/python/example_sdp.py 
 
       - name: Upload wheels
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: wheels
           path: dist
@@ -135,7 +135,7 @@ jobs:
           python examples/python/example_sdp.py 
 
       - name: Upload wheels
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: wheels
           path: dist
@@ -156,7 +156,7 @@ jobs:
           args: --out dist 
 
       - name: Upload sdist
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: sdist
           path: dist

.github/workflows/testpypi.yaml

@@ -40,7 +40,7 @@ jobs:
           python examples/python/example_sdp.py 
 
       - name: Upload wheels
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: wheels
           path: dist
@@ -92,7 +92,7 @@ jobs:
           python examples/python/example_sdp.py 
 
       - name: Upload wheels
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: wheels
           path: dist
@@ -125,7 +125,7 @@ jobs:
           python examples/python/example_sdp.py 
 
       - name: Upload wheels
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: wheels
           path: dist
@@ -146,7 +146,7 @@ jobs:
           args: --out dist 
 
       - name: Upload sdist
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: sdist
           path: dist