chore: Use Melty token to create version bump PR (#1958)

* chore: Use Melty token to create version bump PR

* Update prerelease settings

* Use Melty token to draft release

.github/workflows/version_bump.yml

@@ -66,8 +66,7 @@ jobs:
         body_path: _changelog_fragment.md
         tag_name: v${{ steps.cz-bump.outputs.version }}
         prerelease: ${{ github.event.inputs.prerelease != 'none' }}
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        token: ${{ secrets.MELTYBOT_GITHUB_AUTH_TOKEN }}
 
     - name: Set repo file permissions
       run: |
@@ -77,6 +76,7 @@ jobs:
       uses: peter-evans/create-pull-request@v5
       id: create-pull-request
       with:
+        token: ${{ secrets.MELTYBOT_GITHUB_AUTH_TOKEN }}
         commit-message: "chore: Bump package version"
         title: "chore: Release v${{ steps.cz-bump.outputs.version }}"
         body: |

pyproject.toml

@@ -144,6 +144,8 @@ norecursedirs = "cookiecutter"
 [tool.commitizen]
 name = "cz_version_bump"
 version = "0.31.1"
+changelog_merge_prerelease = true
+prerelease_offset = 1
 tag_format = "v$major.$minor.$patch$prerelease"
 version_files = [
     "docs/conf.py:^release =",