update setErrors

Author: bluebill1049

src/content/docs/useform/seterror.mdx

@@ -36,14 +36,12 @@ The function allows you to manually set one or more errors.
   setError("root.serverError", {
     type: "400",
   })
-  setError("root.random", {
-    type: "random",
-  })
   ```
-- Can be useful in the `handleSubmit` method when you want to give error feedback to a user after async validation. (ex: API returns validation errors)
 - `shouldFocus` doesn't work when an input has been disabled.
-- This method will force set `isValid` formState to `false`. However, it's important to be aware that `isValid` will always be derived from the validation result of your input registration rules or schema result.
-- There are certain keywords that need to be avoided to prevent conflicts with type checking. They are `type` and `types`.
+- This method will force <code>formState.isValid</code> to <code>false</code>.
+  However, <code>isValid</code> is always derived from the validation results of your
+  registered inputs or schema.
+- There are certain keywords that need to be avoided to prevent conflicts with type checking.
 
 </Admonition>