Update changelog for Ocean release, adding version 31.1 and details for new features

Author: isontheline

documentation/src/docs/documentation/changelog/31.md

@@ -7,4 +7,12 @@ title: 31 - Ocean
 
     [Wikipedia](https://en.wikipedia.org/wiki/Ocean)
 
-## 31.0 - Ocean - [Soon](https://webssh.net/documentation/becoming-external-tester/)
+## 31.1 - Ocean (Tide) - [Soon](https://webssh.net/documentation/becoming-external-tester/)
+
+## 31.0 - Ocean
+** March 6, 2026 **
+
+| Title | Type of change | Issue |
+| --- | --- | --- |
+| Deep Linking : Ability to use a custom terminal theme | Added | [#1531](https://github.com/isontheline/pro.webssh.net/issues/1531) |
+| Show servers list as a grid | Added | [#1501](https://github.com/isontheline/pro.webssh.net/issues/1501) |