Create release for 4.0.2 (#3856)

* Create release for 4.0.2

* Update _data for Ruby 4.0.2

* Write up Ruby 4.0.2 Released

---------

Co-authored-by: GitHub Actions Bot <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Takashi Kokubun <takashikkbn@gmail.com>

Author: 3 people

_data/downloads.yml

@@ -7,7 +7,7 @@ preview:
 
 stable:
 
-  - 4.0.1
+  - 4.0.2
   - 3.4.9
   - 3.3.10
   - 3.2.10

_data/releases.yml

@@ -21,6 +21,30 @@
 
 # 4.0 series
 
+- version: 4.0.2
+  date: 2026-03-16
+  post: /en/news/2026/03/16/ruby-4-0-2-released/
+  url:
+    gz:  https://cache.ruby-lang.org/pub/ruby/4.0/ruby-4.0.2.tar.gz
+    zip: https://cache.ruby-lang.org/pub/ruby/4.0/ruby-4.0.2.zip
+    xz:  https://cache.ruby-lang.org/pub/ruby/4.0/ruby-4.0.2.tar.xz
+  size:
+    gz:  23824654
+    zip: 29123568
+    xz:  17874724
+  sha1:
+    gz:  47c3627e2bdfe53dda77d3fa1730e44ef1ed7dfe
+    zip: 3cfd813761009f8fbb6001cf14149dc03bcd85d7
+    xz:  d927e26d22b15c6737df24cdf6ae80542a057240
+  sha256:
+    gz:  51502b26b50b68df4963336ca41e368cde92c928faf91654de4c4c1791f82aac
+    zip: 7cdbef9028a64f73ca59e21cd46c73c794df9c8294f1cb5c50c4d93c6060b240
+    xz:  4618db85bb9ec04d8152d0099db488694a3d3c4f52106625e4ad547f1318db87
+  sha512:
+    gz:  16a6ca0e9407051f58c8e3c4ec2058c52d62a9863174a3eb6dd5e9e2e893a66427e97a6e7fc8b4c3480163bd19a7a0ec4c00e481f90ff42e8f30bdbc9555f628
+    zip: ecac80a6861fd666fc024701233f5b5b93bed9ed9047cd7ca9e11799681b0102729cc53203cee4ac33245a41b786a4a4c802633d1031881200378b011ed74580
+    xz:  be71a5452068dfc3c86b8ec07456b3fdf6dc64e8c0cd16c358fc4ed8ac08707a9c28285ea8a79dbef82031d8c93c71032a82a0b45f3c9ac5325bf3b70d06fbf2
+
 - version: 4.0.1
   date: 2026-01-13
   post: /en/news/2026/01/13/ruby-4-0-1-released/

en/news/_posts/2026-03-16-ruby-4-0-2-released.md

@@ -0,0 +1,50 @@
+---
+layout: news_post
+title: "Ruby 4.0.2 Released"
+author: k0kubun
+translator:
+date: 2026-03-16 23:18:29 +0000
+lang: en
+---
+
+Ruby 4.0.2 has been released.
+
+This is a routine update that includes a bugfix in YJIT for [NoMethodError on Puma](https://github.com/puma/puma/issues/3620).
+Please see the [GitHub Releases](https://github.com/ruby/ruby/releases/tag/v4.0.2) for further details.
+
+## Release Schedule
+
+We intend to release the latest stable Ruby version (currently Ruby 4.0) every two months following the most recent release.
+Ruby 4.0.3 will be released in May, 4.0.4 in July, 4.0.5 in September, and 4.0.6 in November.
+
+If a change arises that significantly affects users, a release may occur earlier than planned, and the subsequent schedule may shift accordingly.
+
+## Download
+
+{% assign release = site.data.releases | where: "version", "4.0.2" | first %}
+
+* <{{ release.url.gz }}>
+
+      SIZE: {{ release.size.gz }}
+      SHA1: {{ release.sha1.gz }}
+      SHA256: {{ release.sha256.gz }}
+      SHA512: {{ release.sha512.gz }}
+
+* <{{ release.url.xz }}>
+
+      SIZE: {{ release.size.xz }}
+      SHA1: {{ release.sha1.xz }}
+      SHA256: {{ release.sha256.xz }}
+      SHA512: {{ release.sha512.xz }}
+
+* <{{ release.url.zip }}>
+
+      SIZE: {{ release.size.zip }}
+      SHA1: {{ release.sha1.zip }}
+      SHA256: {{ release.sha256.zip }}
+      SHA512: {{ release.sha512.zip }}
+
+## Release Comment
+
+Many committers, developers, and users who provided bug reports helped us make this release.
+Thanks for their contributions.