Inconsistent rendering of bullet list at the end of file in the presence of indented links

Describe the bug

When a markdown file ends with a bullet list followed by indented link references, the last bullet list item is visually separated from the previous ones. I played a bit to pinpoint the issue, and it seems that it happens when:

• The file ends with a bullet list,
• Said bullet list is followed by link references,
• And said link references are indented.

Dedenting the link references fixes the issue. The number of lines between the last bullet point and the link references does not seem to matter.

To Reproduce

The piece of markdown with which I encountered the issue:

# Measures of disorder

This benchmark for [measures of disorder][Measures-of-disorder] is small and only intends to show the cost that these tools might incur. It is not meant to be exhaustive in any way.

![Benchmark speed of measures of disorder for increasing size for std::vector<int>](https://i.imgur.com/uGoVIcE.png)

It makes rather easy to see the different groups of complexities:
* *Amp(X)*, *Runs(X)* and *Mono(X)* are obvious O(n) algorithms.
* *Dis(X)* is a more involved O(n) algorithm.
* All of the other measures of disorder run in O(n log n) time.


  [fixed-size-sorters]: Fixed-size-sorters.md
  [insertion-sorter]: Sorters.md#insertion_sorter
  [low-comparisons-sorter]: Fixed-size-sorters.md#low_comparisons_sorter

Expected behavior

I expect the last bullet list item not to be visually separated from the previous ones in such a scenario.

I don't remember where the identation for link references in markdown comes from (maybe old StackOverflow questions?), but so far it has rendered as I expected on most existing platforms where I host my files (Codeberg code browsing, Codeberg Wiki, GitHub code browsing, GitHub Wiki, VSCodium markdown previous), so I expected it to work consistently with Gollum too.

Screenshots

Environment Info

Gollum 6.1.0
Running on: x86_64-linux-musl with Ruby version 3.3.9
Using:
rugged 1.9.0
gollum-rugged_adapter 3.0
gollum-lib 6.0
Markdown rendering gem: kramdown
Other rendering gems:
RedCloth 4.3.4
org-ruby 0.9.12
creole 0.5.0
asciidoctor 2.0.23
wikicloth 0.8.3

I'm running Gollum through the official docker image, and displaying the results in LibreWolf on EndeavourOS.