docs: Add a reference to ReactNative's testID attribute (#2459)

docs/reference/element-attributes.md

@@ -9,7 +9,7 @@ The XCUITest driver supports the following element attributes:
 
 | <div style="width:6em">Name</div> | Description | <div style="width:8em">Example</div> |
 | --- | --- | --- |
-| `name` | Could contain either element's [identifier](https://developer.apple.com/documentation/xctest/xcuielementattributes/1500981-identifier?language=objc) or its [label](https://developer.apple.com/documentation/xctest/xcuielementattributes/1500692-label?language=objc), depending on which one is available first. Could also be `null`. It is recommended to prefer the usage of [accessibilityIdentifier](https://developer.apple.com/documentation/uikit/uiaccessibilityidentification/1623132-accessibilityidentifier) over [accessibilityLabel](https://developer.apple.com/documentation/objectivec/nsobject/1615181-accessibilitylabel) for automation purposes, since the `identifier` property is supposed to stay constant under different locales and does not affect accessibility services such as VoiceOver. | `hello` |
+| `name` | Could contain either element's [identifier](https://developer.apple.com/documentation/xctest/xcuielementattributes/1500981-identifier?language=objc) or its [label](https://developer.apple.com/documentation/xctest/xcuielementattributes/1500692-label?language=objc), depending on which one is available first. Could also be `null`. It is recommended to prefer the usage of [accessibilityIdentifier](https://developer.apple.com/documentation/uikit/uiaccessibilityidentification/1623132-accessibilityidentifier) over [accessibilityLabel](https://developer.apple.com/documentation/objectivec/nsobject/1615181-accessibilitylabel) for automation purposes, since the `identifier` property is supposed to stay constant under different locales and does not affect accessibility services such as VoiceOver. In applications written using [ReactNative](https://reactnative.dev/) framework this attribute reflects the value of the `testID` property. | `hello` |
 | `label` | Element's [label](https://developer.apple.com/documentation/xctest/xcuielementattributes/1500692-label?language=objc) value. Could be `null`. Since XCUITest driver 4.7.3 (WebDriverAgent 4.8.0), the behavior of this value was better aligned with XCTest, so it could include line breaks (`\n`). Before this version, line breaks were replaced by spaces. | `hello`, `hello\nworld` |
 | `type` | Element's [type](https://developer.apple.com/documentation/xctest/xcuielementattributes/1500614-elementtype?language=objc) name | `XCUIElementTypeButton` |
 | `visible` | Whether the element is visible. This value is not available in the "vanilla" XCTest and is read directly from the accessibility layer | `false` |