Update PublishNugetPackage.yml

Author: stratosblue

.github/workflows/PublishNugetPackage.yml

@@ -11,15 +11,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2.3.4
-    - name: Setup .NET Core 5 SDK
-      uses: actions/setup-dotnet@v1.8.0
+    - uses: actions/checkout@v2
+    - name: Setup .NET Core SDK
+      uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 5.0.x
-    - name: Setup .NET Core 3 SDK
-      uses: actions/[email protected]
-      with:
-        dotnet-version: 3.1.x
+        dotnet-version: 6.0.x
     - name: restore dependencies
       run: dotnet restore
     - name: build