chore: specify changelogen output in scripts

[LukasHirt]

We always want to have the same output for the changelog. It would be cumbersome to always have to specify it.

[Copilot]

Pull Request Overview

This PR centralizes the changelogen configuration by moving the output specification from the GitHub workflow to a reusable npm script, improving maintainability and consistency.

Key Changes

• Added a new changelog:generate npm script that specifies the CHANGELOG.md output
• Updated the GitHub release workflow to use the new script instead of inline changelogen command

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
package.json	Added changelog:generate script with standardized changelogen output configuration
.github/workflows/release.yaml	Updated to use the new npm script for changelog generation

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