ci: 调整dotnet版本

.github/workflows/nuget.yml

@@ -9,10 +9,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Install Dotnet 7.x
+      - name: Install Dotnet 8.0.100
         uses: actions/setup-dotnet@v1
         with:
-          dotnet-version: 7.0.304
+          dotnet-version: 8.0.100
           include-prerelease: True
       - name: Setting Version
         id: vars