Update GitHub Actions to latest Node.js 24 versions

Author: davidnmbond

.github/workflows/ci.yml

@@ -14,12 +14,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0 # full history for Nerdbank.GitVersioning
 
       - name: Setup .NET
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: '10.0.x'
           dotnet-quality: 'preview'