add stenci as a contributor for bug (#849)

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

.all-contributorsrc

@@ -919,6 +919,15 @@
         "code",
         "doc"
       ]
+    },
+    {
+      "login": "stenci",
+      "name": "stenci",
+      "avatar_url": "https://avatars.githubusercontent.com/u/5955495?v=4",
+      "profile": "https://github.com/stenci",
+      "contributions": [
+        "bug"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -244,6 +244,7 @@ This library could only exist thanks to the dedication of many volunteers around
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/1nv"><img src="https://avatars.githubusercontent.com/u/10288828?v=4?s=100" width="100px;" alt="Eugene Selifonov"/><br /><sub><b>Eugene Selifonov</b></sub></a><br /><a href="https://github.com/PyFPDF/fpdf2/issues?q=author%3A1nv" title="Bug reports">🐛</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://ez-startup.com"><img src="https://avatars.githubusercontent.com/u/69514175?v=4?s=100" width="100px;" alt="Kuth"/><br /><sub><b>Kuth</b></sub></a><br /><a href="#translation-kuth-chi" title="Translation">🌍</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://rdbr.nl"><img src="https://avatars.githubusercontent.com/u/34062862?v=4?s=100" width="100px;" alt="Ruben de Bruin"/><br /><sub><b>Ruben de Bruin</b></sub></a><br /><a href="https://github.com/PyFPDF/fpdf2/issues?q=author%3ARubendeBruin" title="Bug reports">🐛</a> <a href="https://github.com/PyFPDF/fpdf2/commits?author=RubendeBruin" title="Code">💻</a> <a href="https://github.com/PyFPDF/fpdf2/commits?author=RubendeBruin" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/stenci"><img src="https://avatars.githubusercontent.com/u/5955495?v=4?s=100" width="100px;" alt="stenci"/><br /><sub><b>stenci</b></sub></a><br /><a href="https://github.com/PyFPDF/fpdf2/issues?q=author%3Astenci" title="Bug reports">🐛</a></td>
     </tr>
   </tbody>
 </table>