docs: add joshuakgoldberg as a contributor for tool (#209)

Adds @JoshuaKGoldberg as a contributor for tool.

This was requested by JoshuaKGoldberg [in this
comment](#172 (comment))

---------

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

.all-contributorsrc

@@ -9,7 +9,8 @@
       "contributions": [
         "code",
         "maintenance",
-        "bug"
+        "bug",
+        "tool"
       ],
       "login": "JoshuaKGoldberg",
       "name": "Josh Goldberg",

README.md

@@ -38,7 +38,7 @@ Thanks! 💖
 <table>
   <tbody>
     <tr>
-      <td align="center" valign="top" width="14.28%"><a href="http://www.joshuakgoldberg.com"><img src="https://avatars.githubusercontent.com/u/3335181?v=4?s=100" width="100px;" alt="Josh Goldberg"/><br /><sub><b>Josh Goldberg</b></sub></a><br /><a href="https://github.com/JoshuaKGoldberg/emoji-blast/commits?author=JoshuaKGoldberg" title="Code">💻</a> <a href="#maintenance-JoshuaKGoldberg" title="Maintenance">🚧</a> <a href="https://github.com/JoshuaKGoldberg/emoji-blast/issues?q=author%3AJoshuaKGoldberg" title="Bug reports">🐛</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://www.joshuakgoldberg.com"><img src="https://avatars.githubusercontent.com/u/3335181?v=4?s=100" width="100px;" alt="Josh Goldberg"/><br /><sub><b>Josh Goldberg</b></sub></a><br /><a href="https://github.com/JoshuaKGoldberg/emoji-blast/commits?author=JoshuaKGoldberg" title="Code">💻</a> <a href="#maintenance-JoshuaKGoldberg" title="Maintenance">🚧</a> <a href="https://github.com/JoshuaKGoldberg/emoji-blast/issues?q=author%3AJoshuaKGoldberg" title="Bug reports">🐛</a> <a href="#tool-JoshuaKGoldberg" title="Tools">🔧</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://loige.co"><img src="https://avatars.githubusercontent.com/u/205629?v=4?s=100" width="100px;" alt="Luciano Mammino"/><br /><sub><b>Luciano Mammino</b></sub></a><br /><a href="https://github.com/JoshuaKGoldberg/emoji-blast/commits?author=lmammino" title="Documentation">📖</a> <a href="https://github.com/JoshuaKGoldberg/emoji-blast/commits?author=lmammino" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/helenamerk"><img src="https://avatars.githubusercontent.com/u/7145275?v=4?s=100" width="100px;" alt="helenamerk"/><br /><sub><b>helenamerk</b></sub></a><br /><a href="https://github.com/JoshuaKGoldberg/emoji-blast/commits?author=helenamerk" title="Code">💻</a></td>
     </tr>