feat: update to dotnet 8

Author: xhayper

.github/workflows/build.yml

@@ -24,7 +24,7 @@ jobs:
             - uses: actions/checkout@v4
             - uses: actions/setup-dotnet@v4
               with:
-                  dotnet-version: "7"
+                  dotnet-version: "8"
             - name: Restore
               run: |
                   dotnet restore