### _Why are the changes needed?_
refactor the changelog script to fix:
- the nit of Apache Kyuubi(Incubating)
- the format of the output changelog
### _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.apache.org/docs/latest/develop_tools/testing.html#running-tests) locally before make a pull request
Closes#2839 from ulysses-you/changelog.
Closes#2839
d9e2b6d0 [ulysses-you] comments
b966dc30 [ulysses-you] comments
5f94c52d [ulysses-you] refactor
18cdde22 [ulysses-you] refactor
009699c3 [ulysses-you] Merge branch 'master' of https://github.com/apache/incubator-kyuubi into changelog
76419a92 [ulysses-you] fix
1a4090fc [ulysses-you] nit
b6154b58 [ulysses-you] changelog
Authored-by: ulysses-you <ulyssesyou18@gmail.com>
Signed-off-by: ulysses-you <ulyssesyou@apache.org>
2c7a565164