Update PublishNuGet.yml

Author: lixiaoliyubo

.github/workflows/PublishNuGet.yml

@@ -13,8 +13,6 @@ jobs:
     strategy:  # 使用矩阵策略遍历所有目标框架 [^1]
       matrix:
         frameworks: 
-          - 'net462'
-          - 'net48' 
           - 'net8.0-windows'
     steps:
       - name: Checkout Code