suggest `although` as a replacement for the typo `athough`

**Describe the bug**
Right now, only `a though` is suggested.

**To Reproduce**
mistype although to athough

**Expected behavior**
suggest `although` as a replacement for the typo `athough`

**Screenshots**
N/A

**Platform**
https://kraxen72.github.io/local-harper/ or https://writewithharper.com/editor

**Additional context**
N/A

Reproduce the typo in the local Harper or Write with Harper editor links and confirm that only “a though” is suggested. Trace the existing spelling-suggestion entry point for this case, then verify that typing “athough” suggests “although” without removing the existing behavior.

Written by the indexing model from the issue text.