doc: fix typo

README.md

@@ -50,14 +50,14 @@ For an M1 Mac, read this [SO](https://stackoverflow.com/c/expensify/questions/11
 * Install project gems, including cocoapods, using bundler to ensure everyone uses the same versions. In the project root, run: `bundle install`
     * If you get the error `Could not find 'bundler'`, install the bundler gem first: `gem install bundler` and try again.
     * If you are using MacOS and get the error `Gem::FilePermissionError` when trying to install the bundler gem, you're likely using system Ruby, which requires administrator permission to modify. To get around this, install another version of Ruby with a version manager like [rbenv](https://github.com/rbenv/rbenv#installation).
-* Before installing iOS dependencies, you need to obtain a token from a Mapbox to download their SDKs. Please run `npm run configure-mapbox` and follow the instructions.
+* Before installing iOS dependencies, you need to obtain a token from Mapbox to download their SDKs. Please run `npm run configure-mapbox` and follow the instructions.
 * To install the iOS dependencies, run: `npm install && npm run pod-install`
 * If you are an Expensify employee and want to point the emulator to your local VM, follow [this](https://stackoverflow.com/c/expensify/questions/7699)
 * To run a on a **Development Simulator**: `npm run ios`
 * Changes applied to Javascript will be applied automatically, any changes to native code will require a recompile
 
 ## Running the Android app 🤖
-* Before installing Android dependencies, you need to obtain a token from a Mapbox to download their SDKs. Please run `npm run configure-mapbox` and follow the instructions. If you already did this step for iOS, there is no need to repeat this step.
+* Before installing Android dependencies, you need to obtain a token from Mapbox to download their SDKs. Please run `npm run configure-mapbox` and follow the instructions. If you already did this step for iOS, there is no need to repeat this step.
 * Go through the instructions on [this SO post](https://stackoverflow.com/c/expensify/questions/13283/13284#13284) to start running the app on android.
 * For more information, go through the official React-Native instructions on [this page](https://reactnative.dev/docs/environment-setup#development-os) for "React Native CLI Quickstart" > Mac OS > Android
 * If you are an Expensify employee and want to point the emulator to your local VM, follow [this](https://stackoverflow.com/c/expensify/questions/7699)