Fix file name

Vectorial1024 · Vectorial1024 · commit 7eeb53aa413c · 2026-04-21T16:30:19.000+08:00
diff --git a/README.md b/README.md
@@ -34,7 +34,7 @@ This may cause some unintended inaccuracies in 32-bit PHP, but generally speakin
 
 ### Change log
 
-Please see `CHANGELOG.MD`.
+Please see `CHANGELOG.md`.
 
 ## Example code
 
