Actions updates

Author: webprofusion-chrisc

.github/workflows/DotNetCore_Unit_Tests_Linux.yaml

@@ -91,7 +91,7 @@ jobs:
 
     - name: Generate Test Results Report
       run: |
-        echo "# Test Results" > $GITHUB_STEP_SUMMARY
+        echo "# Test Results" > ./TestResults-${{ runner.os }}/test-summary.md
         sed -i 's/<details>/<details open>/g' ./TestResults-${{ runner.os }}/test-summary.md
         cat ./TestResults-${{ runner.os }}/test-summary.md >> $GITHUB_STEP_SUMMARY
       working-directory: ./certify/src/Certify.Tests/Certify.Core.Tests.Unit
@@ -100,7 +100,7 @@ jobs:
     - name: Generated Test Coverage Report
       run: |
         reportgenerator -reports:./TestResults-${{ runner.os }}/*/*.cobertura.xml -targetdir:./TestResults-${{ runner.os }} -reporttypes:MarkdownSummaryGithub "-title:Test Coverage"
-        cat ./TestResults-${{ runner.os }}/SummaryGithub.md > $GITHUB_STEP_SUMMARY
+        cat ./TestResults-${{ runner.os }}/SummaryGithub.md >> $GITHUB_STEP_SUMMARY
       working-directory: ./certify/src/Certify.Tests/Certify.Core.Tests.Unit
       if: ${{ always() }}