docs(app-check): use quotes vs backticks in example code (#8573)

* Fix typos in app-check index.md

The current JS examples cannot be copied into an editor. Most systems use double or single quotes for imports, not backticks. There was also a missing "const" in one of the examples

* style(lint): result of main rebase and `yarn lint:markdown --write`

our settings for prettier strongly prefer the single-tick apparently

definitely not backticks though...

also there appears to have been some issue on main, but this fixes that

---------

Co-authored-by: Mike Hardy <[email protected]>

Author: tj-mc

docs/app-check/usage/index.md

@@ -174,9 +174,9 @@ So AppCheck module initialization is done in two steps in react-native-firebase
 To configure the react-native-firebase custom provider, first obtain one, then configure it according to the providers you want to use on each platform.
 
 ```javascript
-import { ReactNativeFirebaseAppCheckProvider } from `@react-native-firebase/app-check`;
+import { ReactNativeFirebaseAppCheckProvider } from '@react-native-firebase/app-check';
 
-rnfbProvider = new ReactNativeFirebaseAppCheckProvider();
+const rnfbProvider = new ReactNativeFirebaseAppCheckProvider();
 rnfbProvider.configure({
   android: {
     provider: __DEV__ ? 'debug' : 'playIntegrity',
@@ -198,22 +198,25 @@ rnfbProvider.configure({
 Once you have the custom provider configured, install it in app-check using the firebase-js-sdk compatible API, while saving the returned instance for usage:
 
 ```javascript
-import { getApp } from `@react-native-firebase/app`;
-import { initializeAppCheck  } from `@react-native-firebase/app-check`;
+import { getApp } from '@react-native-firebase/app';
+import { initializeAppCheck } from '@react-native-firebase/app-check';
 
-const appCheck = initializeAppCheck(getApp(), { provider: rnfbProvider, isTokenAutoRefreshEnabled: true });
+const appCheck = initializeAppCheck(getApp(), {
+  provider: rnfbProvider,
+  isTokenAutoRefreshEnabled: true,
+});
 ```
 
 ### Verify AppCheck was initialized correctly
 
 After initializing the custom provider, you can verify AppCheck is working by logging a response from the token server:
 
 ```javascript
-import { getToken  } from `@react-native-firebase/app-check`;
+import { getToken } from '@react-native-firebase/app-check';
 
 try {
   // `appCheckInstance` is the saved return value from initializeAppCheck
-  const { token } = await appCheckInstance.getToken( true);
+  const { token } = await appCheckInstance.getToken(true);
 
   if (token.length > 0) {
     console.log('AppCheck verification passed');

docs/index.md

@@ -272,10 +272,10 @@ However, you only want to do this for the web platform. For non-web / native app
 At some point during your application's bootstrap processes, initialize firebase like this:
 
 ```javascript
-import { getApp, initializeApp } from "@react-native-firebase/app";
+import { getApp, initializeApp } from '@react-native-firebase/app';
 
 // web requires dynamic initialization on web prior to using firebase
-if (Platform.OS === "web") {
+if (Platform.OS === 'web') {
   const firebaseConfig = {
     // ... config items pasted from firebase console for your web app here
   };