Update the series list command to say cards instead of x (#296)

- Update the /series list command so that it says "cards" instead if "x", for example `39 cards`

#289

Reviewed-on: #296
Reviewed-by: VylpesTester <tester@vylpes.com>
Co-authored-by: Ethan Lane <ethan@vylpes.com>
Co-committed-by: Ethan Lane <ethan@vylpes.com>

src/helpers/SeriesHelper.ts

@@ -78,7 +78,7 @@ export default class SeriesHelper {
         const seriesOnPage = series.splice(page * itemsPerPage, itemsPerPage);
 
         const description = seriesOnPage
-            .map(x => `[${x.id}] ${x.name} (x${x.cards.length})`)
+            .map(x => `[${x.id}] ${x.name} (${x.cards.length} cards)`)
             .join("\n");
 
         const embed = new EmbedBuilder()