Update actions/upload-artifact action to v3.1.2

Author: renovate[bot]

.github/workflows/build.yml

@@ -53,7 +53,7 @@ jobs:
         run: dotnet cake --target=Pack
         shell: pwsh
       - name: "Publish Artefacts"
-        uses: actions/[email protected].1
+        uses: actions/[email protected].2
         if: always()
         with:
           name: ${{matrix.os}}