Add comment for each platform

.github/workflows/tests.yml

@@ -82,6 +82,12 @@ jobs:
   # todo: remove after tests
   report:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+          - windows-latest
+          - macos-latest
     permissions:
       contents: read
       actions: read
@@ -99,7 +105,7 @@ jobs:
       - name: Download Coverage Report Artifacts
         uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # v4.1.8
         with:
-          pattern: dotnet-coverage-on-*
+          name: dotnet-coverage-on-${{ matrix.os }}
           path: coverage
           merge-multiple: true
       - name: Code Coverage Report
@@ -109,9 +115,13 @@ jobs:
           badge: true
           format: markdown
           output: both
+      - name: Add platform info
+        run: |
+          echo "Platform: ${{ matrix.os }}" >> code-coverage-results.md
       - name: Add Coverage PR Comment
         uses: marocchino/sticky-pull-request-comment@v2
         if: github.event_name == 'pull_request'
         with:
           recreate: true
           path: code-coverage-results.md
+          header: ${{ matrix.os }}