Publish nightlies as pre-releases

So stable versions can be marked on the Releases page

.github/workflows/nightly.yml

@@ -44,7 +44,7 @@ jobs:
         body: |
           Automatic snapshot release of nod.ai SHARK.
         draft: true
-        prerelease: false
+        prerelease: true
 
     - name: Build Package 
       shell: powershell
@@ -67,18 +67,19 @@ jobs:
     #    $env:SHARK_PACKAGE_VERSION=${{ env.package_version }}
     #    pip wheel -v -w dist . --pre -f https://download.pytorch.org/whl/nightly/torch -f https://llvm.github.io/torch-mlir/package-index/ -f https://nod-ai.github.io/SHARK-Runtime/pip-release-links.html
 
-    - uses: actions/upload-artifact@v2
-      with:
-        path: dist/*
+    #- uses: actions/upload-artifact@v2
+    #  with:
+    #    path: dist/*
     
     - name: Upload Release Assets
       id: upload-release-assets
-      uses: dwenegar/upload-release-assets@v1
+      uses: dwenegar/upload-release-assets@v1.0.1
       env:
         GITHUB_TOKEN: ${{ secrets.NODAI_INVOCATION_TOKEN }}
       with:
         release_id: ${{ steps.create_release.outputs.id }}
         assets_path: ./dist/*
+        asset_content_type: application/vnd.microsoft.portable-executable 
 
     - name: Publish Release
       id: publish_release