add MaterArc as a contributor for design (#272)

* update README.md

* update .all-contributorsrc

---------

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

.all-contributorsrc

@@ -1388,7 +1388,8 @@
       "avatar_url": "https://avatars.githubusercontent.com/u/105017592?v=4",
       "profile": "https://materarc.github.io/sdshelpers.github.io/",
       "contributions": [
-        "mod"
+        "mod",
+        "design"
       ]
     },
     {

README.md

@@ -110,7 +110,7 @@ _View the website version [here](https://scratchaddons.com/contributors)._
     </tr>
     <tr>
       <td align="center" valign="top" width="20%"><a href="https://github.com/Marc92020"><img src="https://avatars2.githubusercontent.com/u/75702334?v=4?s=100" width="100px;" alt="Marc92020"/><br /><sub><b>Marc92020</b></sub></a><br /><a href="https://github.com/ScratchAddons/contributors/issues?q=author%3AMarc92020" title="Bug reports">🐛</a></td>
-      <td align="center" valign="top" width="20%"><a href="https://materarc.github.io/sdshelpers.github.io/"><img src="https://avatars.githubusercontent.com/u/105017592?v=4?s=100" width="100px;" alt="MaterArc"/><br /><sub><b>MaterArc</b></sub></a><br /><a href="#mod-MaterArc" title="Community Moderator (Discord)">🫂</a></td>
+      <td align="center" valign="top" width="20%"><a href="https://materarc.github.io/sdshelpers.github.io/"><img src="https://avatars.githubusercontent.com/u/105017592?v=4?s=100" width="100px;" alt="MaterArc"/><br /><sub><b>MaterArc</b></sub></a><br /><a href="#mod-MaterArc" title="Community Moderator (Discord)">🫂</a> <a href="#design-MaterArc" title="Design">🎨</a></td>
       <td align="center" valign="top" width="20%"><a href="https://scratch.mit.edu/users/Maximouse"><img src="https://avatars1.githubusercontent.com/u/51849865?v=4?s=100" width="100px;" alt="Maximouse"/><br /><sub><b>Maximouse</b></sub></a><br /><a href="https://github.com/ScratchAddons/contributors/commits?author=mxmou" title="Code">💻</a> <a href="#example-mxmou" title="Examples">💡</a> <a href="#translation-mxmou" title="Translation">🌍</a> <a href="https://github.com/ScratchAddons/contributors/issues?q=author%3Amxmou" title="Bug reports">🐛</a></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/Mbrick2"><img src="https://avatars.githubusercontent.com/u/90691415?v=4?s=100" width="100px;" alt="Mbrick2"/><br /><sub><b>Mbrick2</b></sub></a><br /><a href="https://github.com/ScratchAddons/contributors/issues?q=author%3AMbrick2" title="Bug reports">🐛</a></td>
       <td align="center" valign="top" width="20%"><a href="https://github.com/Mel0n7"><img src="https://avatars.githubusercontent.com/u/99061680?v=4?s=100" width="100px;" alt="Melon"/><br /><sub><b>Melon</b></sub></a><br /><a href="https://github.com/ScratchAddons/contributors/commits?author=mel0n7" title="Code">💻</a></td>