Update IDisposable.xml (#7978)

Fix a typo (`staatement` to `statement`)

Author: alexhrao

xml/System/IDisposable.xml

@@ -75,7 +75,7 @@
   
 <a name="Using"></a>   
 ### The C#, F#, and Visual Basic Using statement  
- If your language supports a construct such as the [using](/dotnet/csharp/language-reference/keywords/using) statement in C#, the [Using](/dotnet/visual-basic/language-reference/statements/using-statement) statement in Visual Basic, or the [use](/dotnet/fsharp/language-reference/resource-management-the-use-keyword) staatement in F#, you can use it instead of explicitly calling <xref:System.IDisposable.Dispose%2A?displayProperty=nameWithType> yourself. The following example uses this approach in defining a `WordCount` class that preserves information about a file and the number of words in it.  
+ If your language supports a construct such as the [using](/dotnet/csharp/language-reference/keywords/using) statement in C#, the [Using](/dotnet/visual-basic/language-reference/statements/using-statement) statement in Visual Basic, or the [use](/dotnet/fsharp/language-reference/resource-management-the-use-keyword) statement in F#, you can use it instead of explicitly calling <xref:System.IDisposable.Dispose%2A?displayProperty=nameWithType> yourself. The following example uses this approach in defining a `WordCount` class that preserves information about a file and the number of words in it.  
   
  :::code language="csharp" source="~/snippets/csharp/System/IDisposable/Overview/calling1.cs" id="Snippet1":::
  :::code language="fsharp" source="~/snippets/fsharp/System/IDisposable/Overview/calling1.fs" id="Snippet1":::