Typo fix: Changed Sengrid to Sendgrid on 2 instances (both on line 58) in the README.md file

Author: Kimi450

README.md

@@ -55,7 +55,7 @@ echo "sendgrid.env" >> .gitignore
 source ./sendgrid.env
 ```
 
-Sengrid also supports local enviroment file `.env`. Copy or rename `.env_sample` into `.env` and update [SENGRID_API_KEY](https://app.sendgrid.com/settings/api_keys) with your key.
+Sendgrid also supports local enviroment file `.env`. Copy or rename `.env_sample` into `.env` and update [SENDGRID_API_KEY](https://app.sendgrid.com/settings/api_keys) with your key.
 
 ## Install Package