github-actions[bot] doesn't update description of release pr when main branch have a new update

github-actions[bot] doesn't update **description of release pr** when main branch have a new update, but changelog file is fine

issue ref: https://github.com/kitimark/timeloc/pull/4

#### Expected description of pr
```
## 🤖 I have created a release beep boop

## 1.0.0 (2025-01-17)

### Features

* initiate timeloc ([9f74683](https://github.com/kitimark/timeloc/commit/9f74683fc15fea4140cd796304355a4e28840b4d))
* **timeloc:** not allowed time.Local usage ([#1](https://github.com/kitimark/timeloc/issues/1)) ([9dc1b44](https://github.com/kitimark/timeloc/commit/9dc1b447f617def2329a58e2faefec965133ed35))

### Bug Fixes

* **timeloc:** detect false positive when time package is aliased ([#5](https://github.com/kitimark/timeloc/issues/5)) ([ad2e216](https://github.com/kitimark/timeloc/commit/ad2e2168388186d660cdd32592297376dc0ad3f0))
* **timeloc:** program will panic, when function have a built-in interface in argument ([be6b6c3](https://github.com/kitimark/timeloc/commit/be6b6c314ae399d9d833b75db91835d7eca4c793))

This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).
```

#### Actual description of pr
a fixed commit is lost

```
## 🤖 I have created a release beep boop

## 1.0.0 (2025-01-17)

### Features

* initiate timeloc ([9f74683](https://github.com/kitimark/timeloc/commit/9f74683fc15fea4140cd796304355a4e28840b4d))
* **timeloc:** not allowed time.Local usage ([#1](https://github.com/kitimark/timeloc/issues/1)) ([9dc1b44](https://github.com/kitimark/timeloc/commit/9dc1b447f617def2329a58e2faefec965133ed35))

### Bug Fixes

* **timeloc:** detect false positive when time package is aliased ([#5](https://github.com/kitimark/timeloc/issues/5)) ([ad2e216](https://github.com/kitimark/timeloc/commit/ad2e2168388186d660cdd32592297376dc0ad3f0))

This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).
```
##### Screenshot

#### Steps to reproduce

1. create some change and merge to main
2. github-actions[bot] will create release pr
3. create more change and merge to main (in this case, fix a bug)
4. github-actions[bot] will force-push commit in the same pr but _**it doesn't update description**_

#### Environment details

- Programming language: Golang
- OS: Ubuntu
- language runtime version: 1.22
- release-please version: 16.12.0
- github action version: googleapis/release-please-action@v4

Thanks guys!