Rendered link does not point to correct file

[apiraino]

The automation to add a rendered link to a PR touching documentation sometimes does not point to the correct file.

Example in rust-forge#918 it points to the file SUMMARY.md instead of the new file repositories.md, which is more useful to read.

I should probably test which files reach this point and how the file is choosen from the list.

(not a big deal, in any case)

[Urgau]

We can probably add a list of files to exclude, like SUMMARY.md and index.md.
That should improve the situation, through not completely fix it.

[Urgau]

Opened #2118 to fix this.