Renovate mistakenly transforms issue-like strings to github issues on non-github sources.

[dmaes]

How are you running Renovate?

Self-hosted Renovate CLI

Which platform you running Renovate on?

GitLab (.com or self-hosted)

Which version of Renovate are you using?

43.64.4

Please tell us more about your question or problem

Renovate created a MR in our self-hosted gitlab, based on a release from another project in the same gitlab. The release notes contains an issue-like string (#154760), which gitlab automatically links to the correct issue in our external issue tracker (this is done in the frontend, the actual markdown behind it still contains just the plain string).

Renovate took this string, and transformed it to a non-existing issue on a non-existing github project [#​154760](https://github.com/shared/helm-charts/issues/154760) for the changelog in the MR. It shouldn't do that on non-github sources.

Logs (if relevant)

Logs

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