Completed the profile description of your Lead Devc of douala

I have completed the profile description of Lead Devc of douala by adding the link to the organization that we have created on github for our community

Author: hervegithub

DevCGlobalDirectory.md

@@ -339,6 +339,7 @@
   - Lead(s):
     - [Herve Dzeudjouo](https://github.com/dherve19)
   - Facebook Group: https://www.facebook.com/groups/devcdouala/
+  - Github: https://github.com/Devc-Douala
 </details>
 <details>
   <summary>