docs(readme): update root README to include HashMap project details

singharyan006 · web-flow · commit 125ea3be58b1 · 2025-07-13T13:35:34.000+05:30
diff --git a/README.md b/README.md
@@ -24,7 +24,6 @@ algo-practice/
 │ ├── test.js
 │ └── README.md
 └── README.md
-
 ```
 
 ### `🌀 recursion/`
