Try fix github nuget push

Author: synercoder

.github/workflows/dotnet-core.yml

@@ -15,7 +15,7 @@ env:
   # Project name to pack and publish
   PROJECT_NAME: Synercoding.FileFormats.Pdf
   # GitHub Packages Feed settings
-  GITHUB_FEED: https://nuget.pkg.github.com/synercoder/
+  GITHUB_FEED: https://nuget.pkg.github.com/synercoder/index.json 
   GITHUB_USER: synercoder
   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
   # Official NuGet Feed settings
@@ -58,12 +58,12 @@ jobs:
         uses: actions/download-artifact@v4
         with:
           name: nupkg
-      - name: Push to GitHub Feed
-        run: |
-          for f in ./nupkg/*.nupkg
-          do
-            curl -vX PUT -u "$GITHUB_USER:$GITHUB_TOKEN" -F package=@$f $GITHUB_FEED
-          done
+      - name: Setup .NET Core @ Latest
+        uses: actions/setup-dotnet@v1
+      - name: Publish Nuget to GitHub registry
+        run: dotnet nuget push ./nupkg/*.nupkg -k ${GITHUB_TOKEN} -s ${GITHUB_FEED} --skip-duplicate
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
   deploy:
     needs: build
     if: github.event_name == 'release'
@@ -82,12 +82,10 @@ jobs:
           VERSION="${VERSION//v}"
           echo Clean Version: $VERSION
           dotnet pack -v normal -c Release --include-symbols --include-source -p:SymbolPackageFormat=snupkg -p:PackageVersion=$VERSION -o nupkg src/$PROJECT_NAME/$PROJECT_NAME.*proj
-      - name: Push to GitHub Feed
-        run: |
-          for f in ./nupkg/*.nupkg
-          do
-            curl -vX PUT -u "$GITHUB_USER:$GITHUB_TOKEN" -F package=@$f $GITHUB_FEED
-          done
+      - name: Publish Nuget to GitHub registry
+        run: dotnet nuget push ./nupkg/*.nupkg -k ${GITHUB_TOKEN} -s ${GITHUB_FEED} --skip-duplicate
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: Push to NuGet Feed
         if: ${{ env.NUGET_FEED }} != ''
         run: dotnet nuget push ./nupkg/*.nupkg --source $NUGET_FEED --skip-duplicate --api-key $NUGET_KEY