docs: update changelog

SeanTheBuilder1 · sumneko · commit 8635fefcd2b3 · 2024-08-06T21:13:33.000+08:00
diff --git a/changelog.md b/changelog.md
@@ -2,6 +2,7 @@
 
 ## Unreleased
 <!-- Add all new changes here. They will be moved under a version at release -->
+* `NEW` Add support for binary metamethod on right operand [#2777](https://github.com/LuaLS/lua-language-server/pull/2777)
 
 ## 3.10.1
 `2024-8-2`
