docs: add @stedy as a contributor for doc (#398)

Adds @stedy as a contributor for doc.

This was requested by smeijer [in this
comment](#397 (comment))

[skip ci]

---------

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

.all-contributorsrc

@@ -533,6 +533,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "stedy",
+      "name": "Zach Stednick",
+      "avatar_url": "https://avatars.githubusercontent.com/u/345365?v=4",
+      "profile": "http://zachstednick.com",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -1,7 +1,7 @@
 # Leaflet.GeoSearch
 
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-56-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-57-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 **Demo and Docs: [smeijer.github.io/leaflet-geosearch](https://smeijer.github.io/leaflet-geosearch)**
@@ -429,6 +429,9 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
       <td align="center" valign="top" width="14.28%"><a href="http://www.fit.vutbr.cz/~ibarina/"><img src="https://avatars.githubusercontent.com/u/11453671?v=4?s=100" width="100px;" alt="David Barina"/><br /><sub><b>David Barina</b></sub></a><br /><a href="https://github.com/smeijer/leaflet-geosearch/commits?author=xbarin02" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/mugu-fatman"><img src="https://avatars.githubusercontent.com/u/62667193?v=4?s=100" width="100px;" alt="mugu-fatman"/><br /><sub><b>mugu-fatman</b></sub></a><br /><a href="https://github.com/smeijer/leaflet-geosearch/commits?author=mugu-fatman" title="Code">💻</a></td>
     </tr>
+    <tr>
+      <td align="center" valign="top" width="14.28%"><a href="http://zachstednick.com"><img src="https://avatars.githubusercontent.com/u/345365?v=4?s=100" width="100px;" alt="Zach Stednick"/><br /><sub><b>Zach Stednick</b></sub></a><br /><a href="https://github.com/smeijer/leaflet-geosearch/commits?author=stedy" title="Documentation">📖</a></td>
+    </tr>
   </tbody>
 </table>