Improve iOS contributing guide

Author: imthath-m

ios/CONTRIBUTING.md

@@ -8,11 +8,11 @@ To build and run the demo app follow these steps:
 - Clone the [FluentUI](https://github.com/microsoft/fluentui-apple) repository.
 - Open `ios/FluentUI.xcworkspace` in Xcode.
 - In the Xcode scheme menu choose `Demo.development` and choose an iOS Simulator(or Device if you have your own device provisioning profile) to deploy to.
-- Make sure Swift Package Manager has download 2 dependencies(appcenter-sdk-apple and PLCrashReporter) for demo app.
+- Make sure Swift Package Manager has downloaded 2 dependencies(AppCenter and PLCrashReporter) for demo app.
 - Build and Run the demo app
 
 ## Adding a new component
-- Create a new folder of the Control name (ex. Foo) under under [FluentUI](FluentUI)
+- Create a new folder of the Control name (ex. Foo) under [FluentUI](FluentUI)
 - Create a new swift file. (ex. Foo.swift)
 - Add Foo.swift in Fluent xcode project (All the files are in alphabetical order)
 - Make sure your file is under FluentUILib target
@@ -23,11 +23,11 @@ To build and run the demo app follow these steps:
 - Add a new cocopod subspec in [MicrosoftFluentUI.podspec](https://github.com/microsoft/fluentui-apple/blob/main/MicrosoftFluentUI.podspec) with required dependencies. "s.subspec 'Foo_ios' do |foo_ios|"
 - Verify by "pod spec lint" For more info on [cocoapod](https://cocoapods.org)
 - Build and Run
-- Make sure no warnings and errors. Test your components!
-- Add documentation for your new class and especially for public apis
+- Make sure there are no warnings and errors. Test your components!
+- Add documentation for your new class and especially for public APIs
 - Add Unit Test for FluentUITests framework
 
 ## Checklist before creating a pull request
-Fill out all the information in your [PR description](https://github.com/microsoft/fluentui-apple/blob/main/.github/PULL_REQUEST_TEMPLATE.md#pull-request-checklist)
+Fill out all the information in your [PR description](https://github.com/microsoft/fluentui-apple/blob/main/.github/PULL_REQUEST_TEMPLATE.md#pull-request-checklist).
 
 Once your pull request has been approved by @microsoft/fluentui-native team, if you have the write access you can squash-merge your changes or @microsoft/fluentui-native team member will merge it for you.