Update Ruby to 4.0.2

Author: hayat01sh1da

.ruby-version

@@ -1 +1 @@
-4.0.1
+4.0.2

SECURITY.md

@@ -8,7 +8,7 @@
 | Component            | Version(s) / Tooling            | Notes |
 | -------------------- | ------------------------------ | ----- |
 | OS baseline          | WSL (Ubuntu 24.04.3 LTS)       | Matches the README instructions. |
-| Ruby generators      | Ruby 4.0.1 (`.ruby-version`)   | Uses Ruby stdlib; add gems per script if needed. |
+| Ruby generators      | Ruby 4.0.2 (`.ruby-version`)   | Uses Ruby stdlib; add gems per script if needed. |
 | Python generators    | CPython 3.14.3 (`.python-version`) | Uses Python stdlib; add `requirements.txt` if introducing third-party libs. |
 
 ## Backward Compatibility

ruby/README.md

@@ -1,6 +1,6 @@
 ## 1. Environment
 
-- Ruby 4.0.1
+- Ruby 4.0.2
 
 ## 2. Execution