Blowfish series should use RelPermalink instead of Permalink in ToC

[voigt]

Describe the bug

Table of Contents of an article series uses permalinks instead of relative permalinks. This leads to the issue, that when compiled with a configured baseURL, links of the ToC are not working.

To Reproduce
Steps to reproduce the behavior:

1. Create an article series
2. Set baseURL = "https://christophvoigt.com/" in config.toml
3. hugo serve
4. Try to access a link in the series, it will link to a 404, as it points to https://christophvoigt.com/<path>, not https://localhost:<port>/path

Expected behavior

Link to the actual page, when served on localhost

Hugo & Blowfish versions

hugo v0.140.2+extended+withdeploy darwin/arm64 BuildDate=2024-12-30T15:01:53Z VendorInfo=brew

Additional context

I think the target of the <a href should be

...
        <a href="{{$post.RelPermalink}}">
...

instead of

...
        <a href="{{$post.Permalink}}">
...

At least this fixed the behavior for me.