Generated release notes ignore "[bot]" suffix in username, attribute commit to the wrong user

[mootari]

🏷️ Discussion Type

Bug

Body

When a commit message in a release's commit list references an app account like @renovate[bot], the name is instead parsed and linked as renovate (ignoring the [bot] suffix) and appears in the Contributors section.

Example: https://github.com/biomejs/biome/releases/tag/%40biomejs%2Fbiome%402.5.8

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Note: LLM generated replies violate GitHub's Code of Conduct.

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