Cronjob not actually a cronjob

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Package ecosystem

npm

### Package manager version

_No response_

### Language version

_No response_

### Manifest location and content before the Dependabot update

_No response_

### dependabot.yml content

version: 2

registries:
npm-artifact-registry:
type: npm-registry
url:
token: ${{secrets.GCP_REGISTRY_TOKEN}}

updates:
- package-ecosystem: 'npm'
directory: '/'
cooldown:
default-days: 1
exclude:
- '@dblocal/*'
commit-message:
prefix: 'chore'
schedule:
interval: 'cron'
cronjob: '0 10 * * *'
timezone: 'Europe/Vienna'
registries:
- npm-artifact-registry
groups:
development-dependencies:
dependency-type: development
patterns:
- '*'
production-dependencies:
dependency-type: production
patterns:
- '*'

### Updated dependency

_No response_

### What you expected to see, versus what you actually saw

We have been trying to have dependabot run 3x a day, so, we saw that it supports cronjobs. To our surprise, it doesn't. It says and is called 'cronjob' but can be run only once a day. This is misleading and, preferably, should be an actual cronjob.

### Native package manager behavior

_No response_

### Images of the diff or a link to the PR, issue, or logs

_No response_

### Smallest manifest that reproduces the issue

_No response_