chore: update CI to .NET 8 SDK and latest actions

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: codebytes

.github/workflows/dotnetcore.yml

@@ -12,11 +12,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v6
     - name: Setup .NET Core
-      uses: actions/setup-dotnet@v1
+      uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: '5.0.x'
+        dotnet-version: '8.0.x'
     - name: Install dependencies
       run: dotnet restore
     - name: Build

global.json

@@ -1,6 +1,6 @@
 {
     "sdk": {
-        "version": "3.1.0",
-        "rollForward": "latestMajor"
+        "version": "8.0.100",
+        "rollForward": "latestMinor"
     }
 }