ci: fix upload-artifact

Author: Wenzel

.github/workflows/ci.yml

@@ -334,7 +334,7 @@ jobs:
 
       # upload all generated wheels *.whl
       - name: upload artifact
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: python_wheels
           path: python/dist/manylinux/*
@@ -400,7 +400,7 @@ jobs:
         run: cargo deb --no-strip -- --features xen,kvm,virtualbox,mflow
 
       - name: upload artifact
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: microvmi_deb
           # microvmi_x.x.x_amd64.deb
@@ -466,7 +466,7 @@ jobs:
         working-directory: libmicrovmi
 
       - name: upload artifact
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v4
         with:
           name: microvmi_win32
           path: libmicrovmi/output/*