Dependabot "update-type" not available in metadata retrieved for PR using dependabot/fetch-metadata@v1

[simonschaufi]

Hello, I have the same issue like this person: Dependabot "update-type" not available in metadata retrieved for PR using dependabot/fetch-metadata@v1

For example here: https://github.com/simonschaufi/php-libkml/actions/runs/8285139412/job/22672206081

Run dependabot/[email protected]
  with:
    github-token: ***
    skip-commit-verification: false
    skip-verification: false
Parsing Dependabot metadata
Outputting metadata for 1 updated dependency
  outputs.dependency-names: rector/rector
  outputs.dependency-type: direct:development
  outputs.update-type: null
  outputs.directory: /
  outputs.package-ecosystem: composer
  outputs.target-branch: main
  outputs.previous-version: 
  outputs.new-version: 
  outputs.compatibility-score: 0
  outputs.maintainer-changes: false
  outputs.dependency-group: 
  outputs.alert-state: 
  outputs.ghsa-id: 
  outputs.cvss: 0

As you can see, outputs.update-type is always null

This is my workflow: https://github.com/simonschaufi/php-libkml/blob/main/.github/workflows/dependabot-auto-merge.yml

Is there some misconfiguration or is this really a bug?