revert chages of als.md in master
revert chages of als.md in master

flink-china/flink-china-doc,flink-china/flink-china-doc,flink-china/flink-china-doc,aspoman/flink-china-doc,aspoman/flink-china-doc,aspoman/flink-china-doc,aspoman/flink-china-doc,flink-china/flink-china-doc,aspoman/flink-china-doc