Action merges PRs with failed checks

### Prerequisites

- [x] I have written a descriptive issue title
- [x] I have searched existing issues to ensure the bug has not already been reported

### Fastify version

?

### Plugin version

3

### Node.js version

?

### Operating system

Linux

### Operating system version (i.e. 20.04, 11.3, 10)

?

### Description

When using this action it automatically merges PRs where the checks have failed.
This doesn't seem like correct behaviour. I was considering using the auto approve + Github native auto merge but I think you need a premium account for this,
Also the 'needs' field seems to refer to jobs in the same action instead of other checks.

This is my config:
```
name: Dependabot auto-merge
on:
push:
branches:
- main
pull_request:

jobs:
automerge:
runs-on: ubuntu-latest

permissions:
pull-requests: write
contents: write

steps:
- uses: fastify/github-action-merge-dependabot@v3
```

### Link to code that reproduces the bug

?

### Expected Behavior

I expect this action to only merge PRs where all checks passed.