docs: add banner to config-doctor.md and update dependencies

Author: vonovak

docs/config-doctor.md docs/config-doctor.mdxdocs/config-doctor.md renamed to docs/config-doctor.mdx

@@ -40,7 +40,7 @@ import TabItem from '@theme/TabItem';
 <Tabs>
   <TabItem value="config-doctor" label="A device or any APK file" default>
 
-Use the [Configuration Doctor](../config-doctor.md). (Requires an [Universal sign in](/docs/install#premium) license.)
+Use the [Configuration Doctor](../config-doctor). (Requires an [Universal sign in](/docs/install#premium) license.)
 
 1. Get a device / emulator with the app installed, or get the APK (build it locally or in cloud, download from the Play Console / Play Store...)
 2. Run the tool and follow its instructions:

docs/setting-up/get-config-file.mdx

@@ -22,7 +22,7 @@ This is always (! _absolutely always_ !) a configuration mismatch between your a
 
 Firstly, if you are using Firebase Auth, verify Google is enabled as a Sign-in method in Firebase Console (Build -> Authentication -> Sign-in method).
 
-Then: if you have the APK (on your phone, or computer) that gives this error, we recommend to run the [Configuration Doctor](./config-doctor.md) and follow its instructions:
+Then: if you have the APK (on your phone, or computer) that gives this error, we recommend to run the [Configuration Doctor](./config-doctor) and follow its instructions:
 
 ```bash
 npx @react-native-google-signin/config-doctor