Merge pull request #417 from hippietrail/new-feature-branch-3

fix agreement error in docs

packages/web/src/routes/docs/contributors/dictionary/+page.md

@@ -41,7 +41,7 @@ In `affixes.json`, this expansion rule looks like this:
 ```
 
 Those familiar with `hunspell` might notice some similarities with their dictionary format.
-The main difference are the [metadata fields.](https://docs.rs/harper-core/latest/harper_core/struct.WordMetadata.html)
+The main differences are the [metadata fields.](https://docs.rs/harper-core/latest/harper_core/struct.WordMetadata.html)
 
 Most words in `dictionary.dict` have simple rules applied to them that result in no expansion, but apply metadata through the `gifts_metadata`.
 Those particular rules are done automatically.