Update docs/csharp/language-reference/operators/operator-overloading.md

Author: BillWagner

docs/csharp/language-reference/operators/operator-overloading.md

@@ -69,7 +69,7 @@ Before C# 14, the compound operators can't be overloaded. Overloading the corres
 ## Operator overload resolution
 
 > [!IMPORTANT]
-> This section applies to C# 14 and later. Before C# 14, compound assignment operators and instance increment and decrement operators aren't allowed.
+> This section applies to C# 14 and later. Before C# 14, user-defined compound assignment operators and instance increment and decrement operators aren't allowed.
 
 If `x` is classified as a variable in a compound assignment expression such as `x «op»= y`, instance operators are preferred over any static operator for `«op»`. If an overloaded `«op»=` operator isn't declared for the type of `x` or `x` isn't classified as a variable, the static operators are used.