Update introduction.md

Added missed "static" keyword and parameter in Convert method
exercism · Jul 20, 2023 · c37b297 · c37b297
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diff --git a/exercises/practice/raindrops/.approaches/introduction.md b/exercises/practice/raindrops/.approaches/introduction.md
@@ -12,7 +12,7 @@ For determining that, you will use the the [remainder operator][remainder-operat
 ## Approach: `if` statements
 
 ```csharp
-public string Convert()
+public static string Convert(int number)
 {
     var drops = "";
     if (number % 3 == 0)