Update 0433-mutex.md

Typo fix

Author: glessard

proposals/0433-mutex.md

@@ -176,7 +176,7 @@ extension Mutex where State: ~Copyable {
 
 ## Interaction with Existing Language Features
 
-`Mutex` will decorated with the `@_staticExclusiveOnly` attribute, meaning you will not be able to declare a variable of type `Mutex` as `var`. These are the same restrictions imposed on the recently accepted `Atomic` and `AtomicLazyReference` types. Please refer to the [Atomics proposal](https://github.com/apple/swift-evolution/blob/main/proposals/0410-atomics.md) for a more in-depth discussion on what is allowed and not allowed. These restrictions are enabled for `Mutex` for all of the same reasons why it was resticted for `Atomic`. We do not want to introduce dynamic exclusivity checking when accessing a value of `Mutex` as a class stored property for instance.
+`Mutex` will be decorated with the `@_staticExclusiveOnly` attribute, meaning you will not be able to declare a variable of type `Mutex` as `var`. These are the same restrictions imposed on the recently accepted `Atomic` and `AtomicLazyReference` types. Please refer to the [Atomics proposal](https://github.com/apple/swift-evolution/blob/main/proposals/0410-atomics.md) for a more in-depth discussion on what is allowed and not allowed. These restrictions are enabled for `Mutex` for all of the same reasons why it was resticted for `Atomic`. We do not want to introduce dynamic exclusivity checking when accessing a value of `Mutex` as a class stored property for instance.
 
 ### Interactions with Swift Concurrency