Update GitHub Actions workflow to latest versions and modernize configuration

- Update GitTools/GitVersion from v1.1.1 to v4.1.0 (GitVersion 6.x)
- Update ReportGenerator from 5.2.4 to 5.4.16
- Update publish-unit-test-result-action from v2.16.1 to v2.20.0 with platform-specific variant
- Add explicit permissions block for improved security
- Add concurrency control to prevent duplicate workflow runs
- Modernize .NET SDK setup to support multiple versions (6.x and 8.x)
- Remove matrix strategy (simplified to single job for multi-targeted library)
- Update parameter from trx_files to files per latest action requirements
- Update GitVersion mode from Mainline to ContinuousDelivery

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: Jaben

.github/workflows/publish.yml

@@ -2,40 +2,47 @@ name: Build and Push to Nuget
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+  issues: read
+  checks: write
+  pull-requests: write
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        dotnet-version: [8.x]
-        
+
     steps:
     - name: Checkout
       uses: actions/checkout@v4
       with:
         fetch-depth: 0
- 
+
     - name: Setup Dotnet
       uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: ${{ matrix.dotnet-version }}
+        dotnet-version: |
+          6.x
+          8.x
         
     - name: Install GitVersion
-      uses: gittools/actions/gitversion/setup@v1.1.1
+      uses: gittools/actions/gitversion/setup@v4.1.0
       with:
-        versionSpec: '5.x'     
-        
+        versionSpec: '6.x'
+
     - name: GitVersion
       id: gitversion
-      uses: gittools/actions/gitversion/execute@v1.1.1
-      with:
-        useConfigFile: true
+      uses: gittools/actions/gitversion/execute@v4.1.0
 
     - name: Run Tests
       run: dotnet test --logger trx --collect:"XPlat Code Coverage"
 
     - name: Combine Coverage Reports # This is because one report is produced per project, and we want one result for all of them.
-      uses: danielpalme/ReportGenerator-GitHub-Action@5.2.4
+      uses: danielpalme/ReportGenerator-GitHub-Action@5.4.16
       with:
         reports: "**/*.cobertura.xml" # REQUIRED # The coverage reports that should be parsed (separated by semicolon). Globbing is supported.
         targetdir: "${{ github.workspace }}" # REQUIRED # The directory where the generated report should be saved.
@@ -81,10 +88,10 @@ jobs:
         retention-days: 5
 
     - name: Publish Test Results
-      uses: EnricoMi/publish-unit-test-result-action@v2.16.1
+      uses: EnricoMi/publish-unit-test-result-action/linux@v2.20.0
       if: always()
       with:
-        trx_files: "${{ github.workspace }}/**/*.trx" 
+        files: "${{ github.workspace }}/**/*.trx" 
 
     - name: Pack
       run: dotnet pack src/Docker.Registry.DotNet -c Release -p:PackageVersion=${{ steps.gitversion.outputs.nuGetVersion }} -p:IncludeSymbols=true -p:SymbolPackageFormat=snupkg

GitVersion.yml

@@ -1,4 +1,4 @@
-mode: Mainline
+mode: ContinuousDelivery
 branches: {}
 ignore:
   sha: []