docs: add docs about warnings and errors if async is not awaited

docs/api/expect.md

@@ -1185,6 +1185,8 @@ test('buyApples returns new stock id', async () => {
 
 :::warning
 If the assertion is not awaited, then you will have a false-positive test that will pass every time. To make sure that assertions are actually called, you may use [`expect.assertions(number)`](#expect-assertions).
+
+Since Vitest 2.2, if a method is not awaited, Vitest will show a warning at the end of the test. In Vitest 3, the test will be marked as "failed" if the assertion is not awaited.
 :::
 
 ## rejects
@@ -1214,6 +1216,8 @@ test('buyApples throws an error when no id provided', async () => {
 
 :::warning
 If the assertion is not awaited, then you will have a false-positive test that will pass every time. To make sure that assertions were actually called, you can use [`expect.assertions(number)`](#expect-assertions).
+
+Since Vitest 2.2, if a method is not awaited, Vitest will show a warning at the end of the test. In Vitest 3, the test will be marked as "failed" if the assertion is not awaited.
 :::
 
 ## expect.assertions

docs/guide/browser/locators.md

@@ -389,6 +389,8 @@ It is recommended to use this only after the other locators don't work for your
 
 ## Methods
 
+All methods are asynchronous and must be awaited. Since Vitest 2.2, tests will fail if a method is not awaited.
+
 ### click
 
 ```ts