docs: add link of release/v1.4 to top level readme

Author: shubhamdp

README.md

@@ -17,8 +17,8 @@ Espressif's SDK for Matter is the official Matter development framework for ESP3
 |             v1.1             | [release/v1.1](https://github.com/espressif/esp-matter/tree/release/v1.1) |
 |             v1.2             | [release/v1.2](https://github.com/espressif/esp-matter/tree/release/v1.2) |
 |             v1.3             | [release/v1.3](https://github.com/espressif/esp-matter/tree/release/v1.3) |
-|     v1.4 (Ongoing effort)    |         [main](https://github.com/espressif/esp-matter/tree/main)         |
-
+|             v1.4             | [release/v1.4](https://github.com/espressif/esp-matter/tree/release/v1.4) |
+|     v1.5 (Ongoing effort)    |         [main](https://github.com/espressif/esp-matter/tree/main)         |
 
 ## Getting the repositories