Update interpolated-strings.md (#3350)

* Update interpolated-strings.md

* Update interpolated-strings.md

Author: iubns

docs/csharp/language-reference/keywords/interpolated-strings.md

@@ -19,12 +19,12 @@ Used to construct strings.  An interpolated string looks like a template string
 The arguments of an interpolated string are easier to understand than a [composite format string](../../../standard/base-types/composite-formatting.md#composite-format-string).  For example, the interpolated string  
 
 ```csharp  
-Console.WriteLine($"Name = {name}, hours = {hours:hh}"); 
+Console.WriteLine($"Name = {name}, hours = {date:hh}"); 
 ```  
-contains two interpolated expressions, '{name}' and '{hours:hh}'. The equivalent composite format string is:
+contains two interpolated expressions, '{name}' and '{date:hh}'. The equivalent composite format string is:
 
 ```csharp
-Console.WriteLine("Name = {0}, hours = {1:hh}", name, hours);  
+Console.WriteLine("Name = {0}, hours = {1:hh}", name, date);  
 ```  
 
 The structure of an interpolated string is: