Fixed #9050 -- Fixed a typo in the 1.0 porting guide in the admin section. Thanks ahebert.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@9017 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/releases/1.0-porting-guide.txt

@@ -150,7 +150,7 @@ New (1.0)::
         model = Child
         extra = 3
 
-    class ParentAdmin(models.ModelAdmin):
+    class ParentAdmin(admin.ModelAdmin):
         model = Parent
         inlines = [ChildInline]