Fixed broken link

The broken link for "Ruby: Build your own fast, persistent KV store in Ruby" is replaced with a working link

Author: karandeeppotato

README.md

@@ -137,7 +137,7 @@ It's a great way to learn.
 * [**JavaScript**: _Dagoba: an in-memory graph database_](http://aosabook.org/en/500L/dagoba-an-in-memory-graph-database.html)
 * [**Python**: _DBDB: Dog Bed Database_](http://aosabook.org/en/500L/dbdb-dog-bed-database.html)
 * [**Python**: _Write your own miniature Redis with Python_](http://charlesleifer.com/blog/building-a-simple-redis-server-with-python/)
-* [**Ruby**: _Build your own fast, persistent KV store in Ruby_](https://dinesh.wiki/posts/build-your-own-persistent-kv-store/)
+* [**Ruby**: _Build your own fast, persistent KV store in Ruby_](https://dineshgowda.com/posts/build-your-own-persistent-kv-store/)
 * [**Rust**: _Build your own Redis client and server_](https://tokio.rs/tokio/tutorial/setup)
 
 #### Build your own `Docker`