docs: Fix grammatical errors in README (#827)

README.md

@@ -16,7 +16,7 @@ We want this library to be community-driven, and Twilio SendGrid led. We need yo
 
 For updates to this library, see our [CHANGELOG](https://github.com/sendgrid/sendgrid-nodejs/blob/master/CHANGELOG.md) and [releases](https://github.com/sendgrid/sendgrid-nodejs/releases).
 
-Subscribe to email [release notifications](https://dx.sendgrid.com/newsletter/nodejs) to receive emails about releases and breaking changes.
+Subscribe to our email [release notifications](https://dx.sendgrid.com/newsletter/nodejs) to receive emails about releases and breaking changes.
 
 We appreciate your continued support, thank you!
 
@@ -50,7 +50,7 @@ This library is broken up into several packages as a monorepo so that you only n
 
 All updates to this library are documented in our [CHANGELOG](https://github.com/sendgrid/sendgrid-nodejs/blob/master/CHANGELOG.md) and [releases](https://github.com/sendgrid/sendgrid-nodejs/releases). You may also subscribe to email [release notifications](https://dx.sendgrid.com/newsletter/nodejs) for releases and breaking changes.
 
-Join an experienced and passionate team that focuses on making an impact. [Opportunities abound](https://sendgrid.com/careers) to grow the product - and grow your career! 
+Join the experienced and passionate team that focuses on making an impact. [Opportunities abound](https://sendgrid.com/careers) to grow the product - and grow your career! 
 
 <a name="roadmap"></a>
 # Roadmap