YARN-11777. [UI2] fix the ASF licence comment tag in the partition-usage.hsb introduced by YARN-11757 (#7435)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-ui/src/main/webapp/app/templates/components/partition-usage.hbs

@@ -1,4 +1,4 @@
-{!
+{{!
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information