docs(mutations): fix typos (#3779)

Author: morleytatro

docs/guides/mutations.md

@@ -151,7 +151,7 @@ useMutation(addTodo, {
 })
 ```
 
-You might find that you want to **trigger additional callbacks** than the ones defined on `useMutation` when calling `mutate`. This can be used to trigger component-specific side effects. To do that, you can provide any of the same callback options to the `mutate` function after your mutation variable. Supported overrides include: `onSuccess`, `onError` and `onSettled`. Please keep in mind that those additional callbacks won't run if your component unmounts _before_ the mutation finishes.
+You might find that you want to **trigger additional callbacks** beyond the ones defined on `useMutation` when calling `mutate`. This can be used to trigger component-specific side effects. To do that, you can provide any of the same callback options to the `mutate` function after your mutation variable. Supported overrides include: `onSuccess`, `onError` and `onSettled`. Please keep in mind that those additional callbacks won't run if your component unmounts _before_ the mutation finishes.
 
 ```js
 useMutation(addTodo, {
@@ -182,7 +182,7 @@ mutate(todo, {
 ### Consecutive mutations
 There is a slight difference in handling `onSuccess`, `onError` and `onSettled` callbacks when it comes to consecutive mutations. When passed to the `mutate` function, they will be fired up only _once_ and only if the component is still mounted.  This is due to the fact that mutation observer is removed and resubscribed every time when the `mutate` function is called. On the contrary, `useMutation` handlers execute for each `mutate` call.
 
-> Be aware that most likely, `mutationFn` passed to `useMutation` is ansynchronous. In that case, the order in which mutations are fulfilled may differ from the order of `mutate` function calls.
+> Be aware that most likely, `mutationFn` passed to `useMutation` is asynchronous. In that case, the order in which mutations are fulfilled may differ from the order of `mutate` function calls.
 
 ```js
 useMutation(addTodo, {