docs: add joshuakgoldberg as a contributor for ideas (#286)

Adds @JoshuaKGoldberg as a contributor for ideas.

This was requested by JoshuaKGoldberg [in this
comment](#78 (comment))

---------

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

.all-contributorsrc

@@ -9,7 +9,8 @@
         "tool",
         "code",
         "maintenance",
-        "infra"
+        "infra",
+        "ideas"
       ],
       "login": "JoshuaKGoldberg",
       "name": "Josh Goldberg",

README.md

@@ -395,7 +395,7 @@ See [CODE_OF_CONDUCT.md](./CODE_OF_CONDUCT.md).
     <tr>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/mackenco"><img src="https://avatars.githubusercontent.com/u/4284340?v=4?s=100" width="100px;" alt="Colin MacKenzie"/><br /><sub><b>Colin MacKenzie</b></sub></a><br /><a href="https://github.com/JoshuaKGoldberg/console-fail-test/commits?author=mackenco" title="Code">💻</a> <a href="#ideas-mackenco" title="Ideas, Planning, & Feedback">🤔</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://www.kop.ax/"><img src="https://avatars.githubusercontent.com/u/77674046?v=4?s=100" width="100px;" alt="Dimitri Kopriwa"/><br /><sub><b>Dimitri Kopriwa</b></sub></a><br /><a href="https://github.com/JoshuaKGoldberg/console-fail-test/commits?author=kopax-polyconseil" title="Code">💻</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="#tool-JoshuaKGoldberg" title="Tools">🔧</a> <a href="https://github.com/JoshuaKGoldberg/console-fail-test/commits?author=JoshuaKGoldberg" title="Code">💻</a> <a href="#maintenance-JoshuaKGoldberg" title="Maintenance">🚧</a> <a href="#infra-JoshuaKGoldberg" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</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="#tool-JoshuaKGoldberg" title="Tools">🔧</a> <a href="https://github.com/JoshuaKGoldberg/console-fail-test/commits?author=JoshuaKGoldberg" title="Code">💻</a> <a href="#maintenance-JoshuaKGoldberg" title="Maintenance">🚧</a> <a href="#infra-JoshuaKGoldberg" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="#ideas-JoshuaKGoldberg" title="Ideas, Planning, & Feedback">🤔</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/sosukesuzuki"><img src="https://avatars.githubusercontent.com/u/14838850?v=4?s=100" width="100px;" alt="SUZUKI Sosuke"/><br /><sub><b>SUZUKI Sosuke</b></sub></a><br /><a href="https://github.com/JoshuaKGoldberg/console-fail-test/commits?author=sosukesuzuki" title="Code">💻</a></td>
     </tr>
   </tbody>