fix: melos --graduate doesn't generate changelog entries

[VinhNgT]

Is there an existing issue for this?

• I have searched the existing issues.

Version

6.2.0

Description

When the application is in 'pre-release' state, running melos version -g does not include changes made in the CHANGELOG.md.

Steps to reproduce

1. Enter pre-release state by running melos version -p
2. Commit some changes
3. Graduate by melos version -g

View CHANGELOG.md, we will not see the commit that we just made, only:

 - Graduate package to a stable release. See pre-releases prior to this version for changelog entries. 

Expected behavior

The commit should be included in the CHANGELOG.md when we graduate the application.

Screenshots

Code_oac2rFLkje.mp4

Additional context and comments

Related: #264
Also I have a git hook that automatically adds the package nickname to the commit, that's why in the video when I commit it shows as feat(drv_lcn):... instead of just feat:...