Fixing github actions script.

Author: renemadsen

.github/workflows/dotnet-core-master.yml

@@ -43,7 +43,7 @@ jobs:
       run: |-
         docker tag microtingas/greate-belt-container:latest microtingas/greate-belt-container:latest
     - run: docker save microtingas/greate-belt-container:latest -o greate-belt-container.tar
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v3
       with:
         name: greate-belt-container
         path: greate-belt-container.tar

.github/workflows/dotnet-core-pr.yml

@@ -40,7 +40,7 @@ jobs:
       run: |-
         docker tag microtingas/greate-belt-container:latest microtingas/greate-belt-container:latest
     - run: docker save microtingas/greate-belt-container:latest -o greate-belt-container.tar
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v3
       with:
         name: greate-belt-container
         path: greate-belt-container.tar