react native typos (#14210)

Author: edwinyjlim

contents/docs/error-tracking/installation/react-native.mdx

@@ -55,7 +55,7 @@ These features will be added in future releases.
 
 <CalloutBox icon="IconInfo" title="Hermes engine" type="fyi">
 
-React Native error tracking is supported supported for Android and iOS apps compiled with the [Hermes engine](https://reactnative.dev/docs/hermes) enabled.
+React Native error tracking is supported for Android and iOS apps compiled with the [Hermes engine](https://reactnative.dev/docs/hermes) enabled.
 
 </CalloutBox>
 

contents/docs/integrate/_snippets/install-react-native.mdx

@@ -76,9 +76,9 @@ Then you can access PostHog by importing your instance:
 import { posthog } from './posthog'
 
 export function MyApp1() {
-    useEffect(async () => {
+    useEffect(() => {
         posthog.capture('event_name')
-    }, [posthog])
+    }, [])
 
     return <View>Your app code</View>
 }