Update v1.4.0.md

Author: Tanu-N-Prabhu

Release Notes/v1.4.0.md

@@ -1,4 +1,4 @@
-## Version 1.4.0 - February 5, 2026
+## Version 1.4.0 - February 28, 2026
 
 > **Summary:**  
 > This release introduces **Phase 1: Foundations** of the Python Cheatsheet repository, providing a structured, beginner-friendly reference covering core Python concepts with clean, copy-paste-ready examples.
@@ -55,4 +55,4 @@
 
 ### Other Changes
 * Prepared groundwork for upcoming phases, starting with **Phase 2: Data Structures**
-* Enhanced repository discoverability and navigation consistency
+* Enhanced repository discoverability and navigation consistency