Jenkins - LTS 2.426.2 adding changelog and upgrade guide (#6899)

adding changelog and upgrade guide for 2.426.2

content/_data/changelogs/lts.yml

@@ -10225,6 +10225,35 @@
     message: |-
       Estimate project duration accurately in more cases.
 
+- version: "2.426.2"
+  date: 2023-12-13
+  changes:
+  - type: rfe
+    category: rfe
+    pull: 8503
+    authors:
+      - MarkEWaite
+    pr_title: "[JENKINS-72252] Warn 12 months and 3 months before end of Java support"
+    message: |-
+      Warn users at 12 months prior to end of Java support and again at 3 months prior to end of Java support.
+  - type: bug
+    category: regression
+    pull: 8666
+    authors:
+      - basil
+    references:
+      - url: https://github.com/jenkinsci/winstone/releases/tag/winstone-6.15
+        title: Winstone 6.15 changelog
+      - url: https://github.com/jenkinsci/winstone/releases/tag/winstone-6.16
+        title: Winstone 6.16 changelog
+      - url: https://github.com/eclipse/jetty.project/releases/tag/jetty-10.0.18
+        title: Jetty 10.0.18 changelog
+    pr_title: "[JENKINS-72266] Upgrade Winstone from 6.14 to 6.16 (upgrade Jetty from 10.0.17 to 10.0.18)"
+    message: |-
+      Add support for Unix Domain Sockets.
+      Upgrade Winstone from 6.14 to 6.16.
+      Upgrade Jetty from 10.0.17 to 10.0.18.
+
 # DO NOT EDIT THIS FILE DIRECTLY
 # ALL CHANGES MUST GO THROUGH PULL REQUESTS
 # MALFORMED FILE CONTENTS WILL BREAK THE SITE BUILD

content/_data/upgrades/2-426-2.adoc

@@ -0,0 +1 @@
+No notable changes requiring upgrade notes.