Fix issue caught in `nearest` while testing `slink`

Issue:
https://github.com/genenetwork/gn-gemtext-threads/blob/main/topics/gn1-migration-to-gn2/clustering.gmi

* While running tests for slink, to try and understand what it is doing in
  order to write the appropriate tests for it, an issue arose that pointed a
  blindspot in the former understanding of now `nearest` should work.

  This commit fixes the issue found in both the expected data, and the code.

0 files changed, 0 insertions, 0 deletions