Update CI SDKs

Author: augustoproiete

.github/workflows/ci.yml

@@ -32,9 +32,9 @@ jobs:
     runs-on: ${{ matrix.job.os }}
     steps:
       - name: Setup net5.0
-        uses: actions/setup-dotnet@v1.7.2
+        uses: actions/setup-dotnet@v1.8.1
         with:
-          dotnet-version: "5.0.201"
+          dotnet-version: "5.0.400"
       - name: Run dotnet --info
         run: dotnet --info
       - uses: actions/checkout@v2.3.4