update CONTRIBUTING.md

makes Environmental Variables a sub topic
sendgrid · Oct 31, 2017 · 3c78565 · 3c78565
1 parent 7c5bf33
commit 3c78565
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -77,7 +77,7 @@ git clone https://github.com/sendgrid/sendgrid-python.git
 cd sendgrid-python
 ```
 
-## Environment Variables
+### Environment Variables
 
 First, get your free SendGrid account [here](https://sendgrid.com/free?source=sendgrid-python).