Update README latest version numbers

Refresh the compatibility table in README.md to reflect the newest releases: `main` from `0.2.27` to `0.2.28` and `1.x` from `0.1.27` to `0.1.28`.

Author: mercyblitz

README.md

@@ -110,8 +110,8 @@ Choose the version that matches your Spring Boot generation:
 
 | Branch | Spring Boot Compatibility | Latest Version |
 |--------|---------------------------|----------------|
-| `main` | 3.0.x – 3.5.x, 4.1.x      | `0.2.27`       |
-| `1.x`  | 2.0.x – 2.7.x             | `0.1.27`       |
+| `main` | 3.0.x – 3.5.x, 4.1.x      | `0.2.28`       |
+| `1.x`  | 2.0.x – 2.7.x             | `0.1.28`       |
 
 ### Add Module Dependencies