docs: add kstich as a contributor for code (#6090)

* docs: update README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]

---------

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -1048,6 +1048,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "kstich",
+      "name": "Kevin Stich",
+      "avatar_url": "https://avatars.githubusercontent.com/u/26905335?v=4",
+      "profile": "https://github.com/kstich",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -3,7 +3,7 @@
 [![Maven](https://img.shields.io/maven-central/v/software.amazon.awssdk/s3.svg?label=Maven)](https://search.maven.org/search?q=g:%22software.amazon.awssdk%22%20AND%20a:%22s3%22)
 [![codecov](https://codecov.io/gh/aws/aws-sdk-java-v2/branch/master/graph/badge.svg)](https://codecov.io/gh/aws/aws-sdk-java-v2)
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-116-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-117-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 The **AWS SDK for Java 2.0** is a rewrite of 1.0 with some great new features. As with version 1.0,
@@ -339,6 +339,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/S-Saranya1"><img src="https://avatars.githubusercontent.com/u/196712423?v=4?s=100" width="100px;" alt="Saranya Somepalli"/><br /><sub><b>Saranya Somepalli</b></sub></a><br /><a href="https://github.com/aws/aws-sdk-java-v2/commits?author=S-Saranya1" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/RanVaknin"><img src="https://avatars.githubusercontent.com/u/50976344?v=4?s=100" width="100px;" alt="Ran Vaknin"/><br /><sub><b>Ran Vaknin</b></sub></a><br /><a href="https://github.com/aws/aws-sdk-java-v2/commits?author=RanVaknin" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/greg-at-moderne"><img src="https://avatars.githubusercontent.com/u/192309513?v=4?s=100" width="100px;" alt="Greg Oledzki"/><br /><sub><b>Greg Oledzki</b></sub></a><br /><a href="https://github.com/aws/aws-sdk-java-v2/commits?author=greg-at-moderne" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/kstich"><img src="https://avatars.githubusercontent.com/u/26905335?v=4?s=100" width="100px;" alt="Kevin Stich"/><br /><sub><b>Kevin Stich</b></sub></a><br /><a href="https://github.com/aws/aws-sdk-java-v2/commits?author=kstich" title="Code">💻</a></td>
     </tr>
   </tbody>
 </table>