Update GitHub Actions workflow for .NET 10.0 compatibility

- Upgrade actions/checkout to v4 and actions/setup-dotnet to v4
- Change dotnet-version from 3.1.301 to 10.0.x
- Fixes build failures on ubuntu-latest (Ubuntu 24.04) due to missing libssl1.1
- Avoids Node.js 20 deprecation warnings (effective June 2026)

Co-Authored-By: Claude Haiku 4.5 <[email protected]>

Author: wjlafrance

.github/workflows/dotnet-core.yml

@@ -15,11 +15,11 @@ jobs:
       working-directory: ./src
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Setup .NET Core
-      uses: actions/setup-dotnet@v1
+    - uses: actions/checkout@v4
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: 3.1.301
+        dotnet-version: 10.0.x
     - name: Install dependencies
       run: dotnet restore
       working-directory: ${{env.working-directory}}