docs: add ReneSkukies as a contributor for code, and ideas (#226)

* docs: update README.md

* docs: update .all-contributorsrc

---------

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

.all-contributorsrc

@@ -49,7 +49,9 @@
       "contributions": [
         "bug",
         "doc",
-        "tutorial"
+        "tutorial",
+        "code",
+        "ideas"
       ]
     },
     {

README.md

@@ -136,7 +136,7 @@ You are very welcome to raise issues and start pull requests!
     <tr>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/jschepers"><img src="https://avatars.githubusercontent.com/u/22366977?v=4?s=100" width="100px;" alt="Judith Schepers"/><br /><sub><b>Judith Schepers</b></sub></a><br /><a href="#bug-jschepers" title="Bug reports">🐛</a> <a href="#code-jschepers" title="Code">💻</a> <a href="#doc-jschepers" title="Documentation">📖</a> <a href="#tutorial-jschepers" title="Tutorials">✅</a> <a href="#ideas-jschepers" title="Ideas, Planning, & Feedback">🤔</a> <a href="#test-jschepers" title="Tests">⚠️</a></td>
       <td align="center" valign="top" width="14.28%"><a href="http://www.benediktehinger.de"><img src="https://avatars.githubusercontent.com/u/10183650?v=4?s=100" width="100px;" alt="Benedikt Ehinger"/><br /><sub><b>Benedikt Ehinger</b></sub></a><br /><a href="#bug-behinger" title="Bug reports">🐛</a> <a href="#code-behinger" title="Code">💻</a> <a href="#doc-behinger" title="Documentation">📖</a> <a href="#tutorial-behinger" title="Tutorials">✅</a> <a href="#ideas-behinger" title="Ideas, Planning, & Feedback">🤔</a> <a href="#test-behinger" title="Tests">⚠️</a> <a href="#infra-behinger" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="#test-behinger" title="Tests">⚠️</a> <a href="#maintenance-behinger" title="Maintenance">🚧</a> <a href="#review-behinger" title="Reviewed Pull Requests">👀</a> <a href="#question-behinger" title="Answering Questions">💬</a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://reneskukies.de/"><img src="https://avatars.githubusercontent.com/u/57703446?v=4?s=100" width="100px;" alt="René Skukies"/><br /><sub><b>René Skukies</b></sub></a><br /><a href="#bug-ReneSkukies" title="Bug reports">🐛</a> <a href="#doc-ReneSkukies" title="Documentation">📖</a> <a href="#tutorial-ReneSkukies" title="Tutorials">✅</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://reneskukies.de/"><img src="https://avatars.githubusercontent.com/u/57703446?v=4?s=100" width="100px;" alt="René Skukies"/><br /><sub><b>René Skukies</b></sub></a><br /><a href="#bug-ReneSkukies" title="Bug reports">🐛</a> <a href="#doc-ReneSkukies" title="Documentation">📖</a> <a href="#tutorial-ReneSkukies" title="Tutorials">✅</a> <a href="#code-ReneSkukies" title="Code">💻</a> <a href="#ideas-ReneSkukies" title="Ideas, Planning, & Feedback">🤔</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://reboreexplore.github.io/"><img src="https://avatars.githubusercontent.com/u/43548330?v=4?s=100" width="100px;" alt="Manpa Barman"/><br /><sub><b>Manpa Barman</b></sub></a><br /><a href="#infra-ReboreExplore" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://www.phillipalday.com"><img src="https://avatars.githubusercontent.com/u/1677783?v=4?s=100" width="100px;" alt="Phillip Alday"/><br /><sub><b>Phillip Alday</b></sub></a><br /><a href="#code-palday" title="Code">💻</a> <a href="#infra-palday" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
       <td align="center" valign="top" width="14.28%"><a href="http://davekleinschmidt.com"><img src="https://avatars.githubusercontent.com/u/135920?v=4?s=100" width="100px;" alt="Dave Kleinschmidt"/><br /><sub><b>Dave Kleinschmidt</b></sub></a><br /><a href="#doc-kleinschmidt" title="Documentation">📖</a></td>