docs: add nickmccurdy as a contributor (#517)

* docs: update README.md

* docs: update .all-contributorsrc

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -422,7 +422,8 @@
         "projectManagement",
         "question",
         "code",
-        "test"
+        "test",
+        "doc"
       ]
     },
     {

README.md

@@ -640,7 +640,7 @@ Thanks goes to these people ([emoji key][emojis]):
     <td align="center"><a href="https://github.com/nanivijay"><img src="https://avatars0.githubusercontent.com/u/5945591?v=4" width="100px;" alt=""/><br /><sub><b>Vijay Kumar Otti</b></sub></a><br /><a href="https://github.com/testing-library/user-event/issues?q=author%3Ananivijay" title="Bug reports">🐛</a></td>
     <td align="center"><a href="http://tompicton.com"><img src="https://avatars2.githubusercontent.com/u/12588098?v=4" width="100px;" alt=""/><br /><sub><b>Tom Picton</b></sub></a><br /><a href="https://github.com/testing-library/user-event/issues?q=author%3Atpict" title="Bug reports">🐛</a> <a href="https://github.com/testing-library/user-event/commits?author=tpict" title="Code">💻</a> <a href="https://github.com/testing-library/user-event/commits?author=tpict" title="Tests">⚠️</a></td>
     <td align="center"><a href="https://hung.dev"><img src="https://avatars3.githubusercontent.com/u/8603085?v=4" width="100px;" alt=""/><br /><sub><b>Hung Viet Nguyen</b></sub></a><br /><a href="https://github.com/testing-library/user-event/issues?q=author%3Anvh95" title="Bug reports">🐛</a></td>
-    <td align="center"><a href="https://nickmccurdy.com/"><img src="https://avatars0.githubusercontent.com/u/927220?v=4" width="100px;" alt=""/><br /><sub><b>Nick McCurdy</b></sub></a><br /><a href="#projectManagement-nickmccurdy" title="Project Management">📆</a> <a href="#question-nickmccurdy" title="Answering Questions">💬</a> <a href="https://github.com/testing-library/user-event/commits?author=nickmccurdy" title="Code">💻</a> <a href="https://github.com/testing-library/user-event/commits?author=nickmccurdy" title="Tests">⚠️</a></td>
+    <td align="center"><a href="https://nickmccurdy.com/"><img src="https://avatars0.githubusercontent.com/u/927220?v=4" width="100px;" alt=""/><br /><sub><b>Nick McCurdy</b></sub></a><br /><a href="#projectManagement-nickmccurdy" title="Project Management">📆</a> <a href="#question-nickmccurdy" title="Answering Questions">💬</a> <a href="https://github.com/testing-library/user-event/commits?author=nickmccurdy" title="Code">💻</a> <a href="https://github.com/testing-library/user-event/commits?author=nickmccurdy" title="Tests">⚠️</a> <a href="https://github.com/testing-library/user-event/commits?author=nickmccurdy" title="Documentation">📖</a></td>
   </tr>
   <tr>
     <td align="center"><a href="http://timdeschryver.dev"><img src="https://avatars1.githubusercontent.com/u/28659384?v=4" width="100px;" alt=""/><br /><sub><b>Tim Deschryver</b></sub></a><br /><a href="https://github.com/testing-library/user-event/commits?author=timdeschryver" title="Tests">⚠️</a></td>