Ensure newlines when appending to sonar properties

Author: ethauvin

.github/workflows/bld.yml

@@ -46,7 +46,7 @@ jobs:
 
       - name: Add Sonar jdkHome
         if: success() && matrix.java-version == env.COVERAGE_JDK && matrix.os == 'ubuntu-latest'
-        run: echo sonar.java.jdkHome=${{ env.JAVA_HOME }} >> sonar-project.properties
+        run: printf "\nsonar.java.jdkHome=${{ env.JAVA_HOME }}\n" >> sonar-project.properties
 
       - name: SonarCloud Scan
         uses: SonarSource/sonarqube-scan-action@v7.0.0