Fix footer content on the UI
Fix footer content on the UI

- Update license to read "Code licensed under Apache Open Source"

spring-cloud/spring-cloud-dataflow-ui,spring-cloud/spring-cloud-dataflow-ui,spring-cloud/spring-cloud-dataflow-ui,ghillert/spring-cloud-dataflow-ui,ghillert/spring-cloud-dataflow-ui,spring-cloud/spring-cloud-dataflow-ui,ghillert/spring-cloud-dataflow-ui,BoykoAlex/spring-cloud-dataflow-ui,BoykoAlex/spring-cloud-dataflow-ui,cppwfs/spring-cloud-dataflow-ui,BoykoAlex/spring-cloud-dataflow-ui,ghillert/spring-cloud-dataflow-ui,BoykoAlex/spring-cloud-dataflow-ui,cppwfs/spring-cloud-dataflow-ui,cppwfs/spring-cloud-dataflow-ui,cppwfs/spring-cloud-dataflow-ui