Update dotnet CI

Author: Coding-Enthusiast

.github/workflows/dotnetCI.yml

@@ -10,11 +10,11 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Setup .NET
-      uses: actions/setup-dotnet@v1
+      uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: 5.0.x
+        dotnet-version: 6.0.x
     - name: Build
       run: dotnet build ./Src/Denovo.sln -c Release
     - name: Test