Udpated build scripts to net7

Author: magahl-swegon

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v2
       with:
-        dotnet-version: 6.0.x
+        dotnet-version: 7.0.x
     - name: Restore dependencies
       run: dotnet restore
     - name: Build

.github/workflows/publish.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Setup .NET
         uses: actions/setup-dotnet@v2
         with:
-          dotnet-version: 6.0.x
+          dotnet-version: 7.0.x
 
       - uses: dotnet/nbgv@master
         id: nbgv