Fix CI (#535)

Author: galvesribeiro

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 3.1.301
+        dotnet-version: 3.1.412
     - name: Build
       run: dotnet build -c Release
     - name: Test

.github/workflows/publish.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Setup .NET Core
         uses: actions/setup-dotnet@v1
         with:
-          dotnet-version: 3.1.301
+          dotnet-version: 3.1.412
       - name: Install SignClient tool
         run: dotnet tool install --tool-path . SignClient
       - name: Install NBGV tool