fix(dictionary-api): change slug mapping from word.slug to word.id (#281)

## Description
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[adds/removes/fixes/replaces] the [feature/bug/etc] -->

This pull request makes a small change to the API response format for
the dictionary collection. The `slug` field in the response is now set
to use the `id` property from the source data, instead of the previous
`slug` property.

## Related Issue
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#123 or Resolves #123 -->

- #251
- #257

## Screenshots/Screencasts
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changes (especially if it's a visual change) -->

NA

## Notes to Reviewer
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NA

Author: babblebey

src/pages/api/v1/browse/index.js

@@ -12,7 +12,7 @@ export async function GET() {
   const dictionary = await getCollection("dictionary");
   const response = dictionary.map((word) => {
     return {
-      slug: word.slug,
+      slug: word.id,
       title: word.data.title,
       content: word.body,
     };