Merge pull request AllAlgorithms#21 from AllAlgorithms/social

add github!

Author: abranhe

readme.md

@@ -25,6 +25,9 @@
 <a href="https://instagram.com/AllAlgorithms">
   <img src="https://www.instagram.com/static/images/ico/apple-touch-icon-152x152-precomposed.png/419a6f9c7454.png" width="17px"> Instagram
 </a>&nbsp;&nbsp;&nbsp;
+<a href="https://github.com/AllAlgorithms">
+  <img src="https://img.icons8.com/ios-glyphs/90/333333/github.png" width="18px"> Github
+</a>&nbsp;&nbsp;&nbsp;
 </p>
 
 <br>