[KYUUBI #1020] Fix incubating issue

<!--
Thanks for sending a pull request!

Here are some tips for you:
  1. If this is your first time, please read our contributor guidelines: https://kyuubi.readthedocs.io/en/latest/community/contributions.html
  2. If the PR is related to an issue in https://github.com/apache/incubator-kyuubi/issues, add '[KYUUBI #XXXX]' in your PR title, e.g., '[KYUUBI #XXXX] Your PR title ...'.
  3. If the PR is unfinished, add '[WIP]' in your PR title, e.g., '[WIP][KYUUBI #XXXX] Your PR title ...'.
-->

### _Why are the changes needed?_
<!--
Please clarify why the changes are needed. For instance,
  1. If you add a feature, you can talk about the use case of it.
  2. If you fix a bug, you can clarify why it is a bug.
-->
Make it more cleaner.

### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

- [ ] Add screenshots for manual tests if appropriate

- [ ] [Run test](https://kyuubi.readthedocs.io/en/latest/develop_tools/testing.html#running-tests) locally before make a pull request

Closes #1020 from ulysses-you/incubating.

Closes #1020

5ae2d0d4 [ulysses-you] fix

Authored-by: ulysses-you <ulyssesyou18@gmail.com>
Signed-off-by: Kent Yao <yao@apache.org>

DISCLAIMER

@@ -1,4 +1,4 @@
-Apache Kyuubi(incubating) is an effort undergoing incubation at the Apache
+Apache Kyuubi (Incubating) is an effort undergoing incubation at the Apache
 Software Foundation (ASF), sponsored by the Apache Incubator PMC.
 
 Incubation is required of all newly accepted projects until a further review

NOTICE

@@ -1,5 +1,5 @@
 
-Apache Kyuubi
+Apache Kyuubi (Incubating)
 Copyright 2021 and onwards The Apache Software Foundation.
 
 This product includes software developed at

NOTICE-binary

@@ -1,5 +1,5 @@
 
-Apache Kyuubi
+Apache Kyuubi (Incubating)
 Copyright 2021 and onwards The Apache Software Foundation.
 
 This product includes software developed at