Update IDISP008.md

Author: sungam3r

documentation/IDISP008.md

@@ -62,7 +62,7 @@ Change to
 public readonly IDisposable Disposable; // We can now check all places it is assigned and hopefully figure out if we should dispose
 ```
 
-#### Example public field
+#### Example public property
 ```cs
 public IDisposable Disposable { get; set; } // could be assigned from the outside so we don't know if disposing it is safe.
 ```
@@ -99,4 +99,4 @@ Or put this at the top of the file to disable all instances.
     "IDISP008:Don't assign member with injected and created disposables", 
     Justification = "Reason...")]
 ```
-<!-- end generated config severity -->
+<!-- end generated config severity -->