docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -1,6 +1,6 @@
 # Path2Finding Visualizer
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-[![All Contributors](https://img.shields.io/badge/all_contributors-3-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-4-orange.svg?style=flat-square)](#contributors-)
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 ## A Pathfinding Algorithm Visualization Tool
 
@@ -61,6 +61,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <td align="center"><a href="https://uptonm.dev/"><img src="https://avatars3.githubusercontent.com/u/23084678?v=4" width="100px;" alt=""/><br /><sub><b>Mike Upton</b></sub></a><br /><a href="https://github.com/path2finding/visualizer/commits?author=uptonm" title="Code">💻</a> <a href="#infra-uptonm" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
     <td align="center"><a href="https://github.com/ShawnToubeau"><img src="https://avatars1.githubusercontent.com/u/22332636?v=4" width="100px;" alt=""/><br /><sub><b>Shawn Toubeau</b></sub></a><br /><a href="https://github.com/path2finding/visualizer/commits?author=ShawnToubeau" title="Code">💻</a> <a href="#infra-ShawnToubeau" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="#design-ShawnToubeau" title="Design">🎨</a> <a href="https://github.com/path2finding/visualizer/commits?author=ShawnToubeau" title="Documentation">📖</a></td>
     <td align="center"><a href="http://jame.dev"><img src="https://avatars2.githubusercontent.com/u/21059291?v=4" width="100px;" alt=""/><br /><sub><b>Jame Coyne</b></sub></a><br /><a href="https://github.com/path2finding/visualizer/commits?author=JamesCoyne" title="Code">💻</a> <a href="#design-JamesCoyne" title="Design">🎨</a> <a href="https://github.com/path2finding/visualizer/commits?author=JamesCoyne" title="Documentation">📖</a> <a href="#infra-JamesCoyne" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a></td>
+    <td align="center"><a href="https://github.com/gordenstein72"><img src="https://avatars1.githubusercontent.com/u/33324346?v=4" width="100px;" alt=""/><br /><sub><b>Harry Gordenstein</b></sub></a><br /><a href="https://github.com/path2finding/visualizer/commits?author=gordenstein72" title="Code">💻</a> <a href="#infra-gordenstein72" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="https://github.com/path2finding/visualizer/commits?author=gordenstein72" title="Documentation">📖</a></td>
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