Fix Typo in default-marshalling-for-arrays.md (#41544)

Fixes two typos in default-marshalling-for-arrays.md for `UnmanagedType.SafeArray` (was `UnmanagedType.Safe array`).

Author: ThorstenReichert

docs/framework/interop/default-marshalling-for-arrays.md

@@ -321,12 +321,12 @@ void New(long [][][] ar );
 
 ```vb
 Sub New1( ar As System.Array )
-Sub New2( <MarshalAs(UnmanagedType.Safe array)> ar As System.Array )
+Sub New2( <MarshalAs(UnmanagedType.SafeArray)> ar As System.Array )
 ```
 
 ```csharp
 void New1( System.Array ar );
-void New2( [MarshalAs(UnmanagedType.Safe array)] System.Array ar );
+void New2( [MarshalAs(UnmanagedType.SafeArray)] System.Array ar );
 ```
 
 #### Unmanaged signature