docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -1,6 +1,6 @@
 # 🍃 Gatsby Leaflet Starter
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-2-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-3-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 Jumpstart your next Gatsby mapping project with Leaflet!
@@ -66,6 +66,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
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     <td align="center"><a href="https://colbyfayock.com/newsletter"><img src="https://avatars2.githubusercontent.com/u/1045274?v=4" width="100px;" alt=""/><br /><sub><b>Colby Fayock</b></sub></a><br /><a href="https://github.com/colbyfayock/gatsby-starter-leaflet/commits?author=colbyfayock" title="Code">💻</a> <a href="https://github.com/colbyfayock/gatsby-starter-leaflet/commits?author=colbyfayock" title="Documentation">📖</a></td>
     <td align="center"><a href="http://fuku710.info"><img src="https://avatars2.githubusercontent.com/u/13159978?v=4" width="100px;" alt=""/><br /><sub><b>Fukuda Naoto</b></sub></a><br /><a href="https://github.com/colbyfayock/gatsby-starter-leaflet/commits?author=fuku710" title="Code">💻</a></td>
+    <td align="center"><a href="http://[email protected]"><img src="https://avatars0.githubusercontent.com/u/59700645?v=4" width="100px;" alt=""/><br /><sub><b>Digvijay Singh Rathore</b></sub></a><br /><a href="https://github.com/colbyfayock/gatsby-starter-leaflet/commits?author=digvijaysrathore" title="Code">💻</a></td>
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