Update Form.xml fix typo (dotnet#9103)

Author: ant290

xml/System.Windows.Forms/Form.xml

@@ -5855,7 +5855,7 @@ This example assumes that the `CreateMyOpaqueForm` method is called from another
 ## Remarks  
  To make a form owned by another form, assign its <xref:System.Windows.Forms.Form.Owner%2A> property a reference to the form that will be the owner.  
 
- When a form is owned by another form, it is closed or hidden with the owner form. For example, consider a form named `Form2` that is owned by a form named `Form1`. If `Form1` is closed or minimized, `Form2` is also closed or hidden.Owned forms are also never displayed behind their owner form. You can use owned forms for windows such as find and replace windows, which should not disappear when the owner form is selected. To determine the forms that are owned by a parent form, use the <xref:System.Windows.Forms.Form.OwnedForms%2A> property.  
+ When a form is owned by another form, it is closed or hidden with the owner form. For example, consider a form named `Form2` that is owned by a form named `Form1`. If `Form1` is closed or minimized, `Form2` is also closed or hidden. Owned forms are also never displayed behind their owner form. You can use owned forms for windows such as find and replace windows, which should not disappear when the owner form is selected. To determine the forms that are owned by a parent form, use the <xref:System.Windows.Forms.Form.OwnedForms%2A> property.  
 
  ]]></format>
         </remarks>