Fix orb YAML parsing: replace heredoc with echo commands for coveralls config

Author: edwh

.circleci/orb/freegle-tests.yml

@@ -699,10 +699,7 @@ commands:
 
               # Create coveralls config in container
               echo "DEBUG: Creating .coveralls.yml in container..."
-              docker exec freegle-apiv1 bash -c "cat > /var/www/iznik/.coveralls.yml << 'EOFCFG'
-coverage_clover: clover.xml
-service_name: circleci
-EOFCFG"
+              docker exec freegle-apiv1 bash -c "echo 'coverage_clover: clover.xml' > /var/www/iznik/.coveralls.yml && echo 'service_name: circleci' >> /var/www/iznik/.coveralls.yml"
 
               # Run php-coveralls from within the container (which has PHP)
               echo "DEBUG: Running php-coveralls in container..."