Update CHANGELOG

Author: shulhi

CHANGELOG.md

@@ -37,6 +37,7 @@
 - Fix printer removing private for empty record. https://github.com/rescript-lang/rescript/pull/7448
 - Fix: handle dynamic imports with module aliases. https://github.com/rescript-lang/rescript/pull/7452
 - Fix missing unescaping when accessing prop with exotic name. https://github.com/rescript-lang/rescript/pull/7469
+- Fix syntax error with mutable nested record. https://github.com/rescript-lang/rescript/pull/7470
 
 #### :house: Internal
 

Example.res

@@ -0,0 +1,16 @@
+type foo = {bar: int}
+
+type a = {
+  k: {"x": int},
+  mutable f: int,
+  g: {
+    @as("ad") g1: int,
+    mutable g2: int
+  }
+}
+
+type b = {
+  ...foo,
+  mutable f: int,
+  g: string
+}