docs: Grammerly checks on *.md files (#101)

* adding code review section under contributing.md

* add grammerly checks on *.md files

* Update first-timers.md

Author: prathamsharma92

CONTRIBUTING.md

@@ -9,6 +9,7 @@ Hello! Thank you for choosing to help contribute to one of the SendGrid open sou
 - [Testing](#testing)
 - [Style Guidelines & Naming Conventions](#style-guidelines-and-naming-conventions)
 - [Creating a Pull Request](#creating-a-pull-request)
+- [Code Reviews](#code-reviews)
 
 <a name="roadmap"></a>
 We use [Milestones](https://github.com/sendgrid/ruby-http-client/milestones) to help define current roadmaps, please feel free to grab an issue from the current milestone. Please indicate that you have begun work on it to avoid collisions. Once a PR is made, community review, comments, suggestions, and additional PRs are welcomed and encouraged.
@@ -190,3 +191,8 @@ Please run your code through:
     with a clear title and description against the `development` branch. All tests must be passing before we will review the PR.
 
 If you have any additional questions, please feel free to [email](mailto:dx@sendgrid.com) us or create an issue in this repo.
+
+<a name="code-reviews"></a>
+## Code Reviews
+
+If you can, please look at open PRs and review them. Give feedback and help us merge these PRs much faster! If you don't know how, Github has some great <a href="https://help.github.com/articles/about-pull-request-reviews/">information on how to review a Pull Request.</a>

README.md

@@ -103,6 +103,7 @@ Quick links:
 - [Bug Reports](https://github.com/sendgrid/ruby-http-client/blob/master/CONTRIBUTING.md#submit-a-bug-report)
 - [Sign the CLA to Create a Pull Request](https://github.com/sendgrid/ruby-http-client/blob/master/CONTRIBUTING.md)
 - [Improvements to the Codebase](https://github.com/sendgrid/ruby-http-client/blob/master/CONTRIBUTING.md#improvements-to-the-codebase)
+- [Review Pull Requests](https://github.com/sendgrid/ruby-http-client/blob/master/CONTRIBUTING.md#code-reviews)
 
 <a name="about"></a>
 # About

first-timers.md

@@ -35,7 +35,7 @@ We label our issues according to their difficulty level. You can find easy ones
    git pull upstream <dev-branch>
    ```
 
-3. Create a new topic branch (off the main project development branch) to
+3. Create a new topic branch (off of the main project development branch) to
    contain your feature, change, or fix:
 
    ```bash