remove superfluous comma

Co-authored-by: Eugene Kolnick <[email protected]>

Author: gitsstewart

pages/careers/_open-positions.html

@@ -280,7 +280,7 @@ <h4 style="margin-top: 14px;" id="we-are-not-actively-hiring-for-this-role"><a c
       in specific areas of the Gruntwork Library, and help customers succeed with them.
     </p>
     <p>
-      This role will focus specifically on one of three main areas of expertise in our Gruntwork Library: VPC, or ECS. 
+      This role will focus specifically on one of three main areas of expertise in our Gruntwork Library: VPC or ECS. 
       We’re looking for someone who has senior-level knowledge of best practices, along with significant comfort working with Terraform. 
       You should have prior experience performing common functions and executing best practices. 
       We’ll also be asking you to work with our next-generation patching tool, Patcher, to streamline keeping our modules up to date, and to help support customers.