chore: disable spellcheck on contributors in README.md

Author: JoshuaKGoldberg

README.md

@@ -41,6 +41,7 @@ Thanks! 💖
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
 <!-- prettier-ignore-start -->
 <!-- markdownlint-disable -->
+<!-- spellchecker: disable -->
 <table>
   <tbody>
     <tr>
@@ -50,6 +51,7 @@ Thanks! 💖
   </tbody>
 </table>
 
+<!-- spellchecker: enable -->
 <!-- markdownlint-restore -->
 <!-- prettier-ignore-end -->