docs: add @berce as a contributor

.all-contributorsrc

@@ -277,6 +277,15 @@
       "contributions": [
         "translation"
       ]
+    },
+    {
+      "login": "berce",
+      "name": "berce",
+      "avatar_url": "https://avatars.githubusercontent.com/u/10439709?v=4",
+      "profile": "https://github.com/berce",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7

CONTRIBUTORS.md

@@ -44,6 +44,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
   </tr>
   <tr>
     <td align="center"><a href="https://github.com/ericamattos"><img src="https://avatars.githubusercontent.com/u/4341417?v=4?s=100" width="100px;" alt=""/><br /><sub><b>ericamattos</b></sub></a><br /><a href="#translation-ericamattos" title="Translation">🌍</a></td>
+    <td align="center"><a href="https://github.com/berce"><img src="https://avatars.githubusercontent.com/u/10439709?v=4?s=100" width="100px;" alt=""/><br /><sub><b>berce</b></sub></a><br /><a href="https://github.com/freesewing/freesewing/commits?author=berce" title="Documentation">📖</a></td>
   </tr>
 </table>
 

CONTRIBUTORS_BADGE.md

@@ -1,4 +1,4 @@
 
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-29-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-30-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->