Fix typo in AS guide [ci skip]

guides/source/active_support_core_extensions.md

@@ -3727,13 +3727,13 @@ Extensions to `Marshal`
 
 Active Support adds constant autoloading support to `load`.
 
-For example, the file cache store deserializes this way: 
+For example, the file cache store deserializes this way:
 
 ```ruby
 File.open(file_name) { |f| Marshal.load(f) }
 ```
 
-If the cached data refers to a constant that is unknown at that point, the autoloading mechanism is triggered and if it succeeds the desarialization is retried transparently.
+If the cached data refers to a constant that is unknown at that point, the autoloading mechanism is triggered and if it succeeds the deserialization is retried transparently.
 
 WARNING. If the argument is an `IO` it needs to respond to `rewind` to be able to retry. Regular files respond to `rewind`.