[IGNORE] fix generate-changelog inserting entries at wrong position

[slashpai]

Description

Before (broken):

## 0.3.1 / 2026-03-04     ← line 1 written
                           ← new section injected here
## 0.3.2 / 2026-03-10
- new entries...
- old 0.3.1 entries...     ← these now incorrectly appear under 0.3.2
## 0.3.0 / ...

After (fixed):

## 0.3.2 / 2026-03-10     ← new section prepended at top
- new entries...
## 0.3.1 / 2026-03-04     ← previous content preserved below
- old 0.3.1 entries...
## 0.3.0 / ...

Type of change

• FEATURE (non-breaking change which adds functionality)
• ENHANCEMENT (non-breaking change which improves existing functionality)
• BUGFIX (non-breaking change which fixes an issue)
• BREAKINGCHANGE (fix or feature that would cause existing functionality to not work as expected)
• DOC (documentation only)
• IGNORE (tooling, build system, CI, etc.)

Verification

• Unit tests added/updated
• Integration tests added/updated
• E2E tests added/updated
• Manual testing performed

Checklist

• Pull request has a descriptive title and context useful to a reviewer
• Code follows project conventions and passes linting
• All commits have DCO signoffs

[jgbernalp]

We probably can replace this with the new version from Perses: https://github.com/perses/perses/blob/main/scripts/generate-changelog/generate-changelog.go

[slashpai]

I tried using that but same issue exists

simply bumped version and ran the script

## 0.3.2 / 2026-03-10

## 0.3.3 / 2026-03-12

- [ENHANCEMENT] Publish container images to quay.io (#340)
- [BUGFIX] bump kube-rbac-proxy from v0.13.1 to v0.21.0
- [BUGFIX] Support api_prefix in Perses client factory
- [BUGFIX] Support api_prefix in Perses client factory
- [DOC] Add bundle-check, installer-check, and helm chart steps to release guide (#361)

[//]: <UNKNOWN ENTRIES. Release shepherd, please review the following list and categorize them or remove them>

- [UNKNOWN] Merge release/v0.3 into main (#364)
- [UNKNOWN] docs: use Github URLS for cert-manager and minikube (#339)
- [UNKNOWN] Merge release/v0.3 into main (#331)
- [UNKNOWN] docs: add support for markdown formatting and validation (#332)

- [BUGFIX] fix delete errors being silently swallowed in dashboard, datasource and globaldatasource controllers (#351)
- [BUGFIX] add missing pods RBAC permission to role.yaml (#352)
- [BUGFIX] fix silently swallowed errors in secret watch and OAuth file configuration (#353)
- [BUGFIX] Fix probe ports ignoring spec.containerPort (#347)
- [BUGFIX] Fix spec.containerPort being ignored by Service and Perses server (#345)
- [BUGFIX] Fix kube-rbac-proxy upstream port mismatch (#343)
- ```