Update _index.md

Changed it according to the feedback to follow the guidelines

Author: azarboon

content/en/docs/concepts/containers/_index.md

@@ -13,7 +13,7 @@ card:
 
 <!-- overview -->
 
-Note that "container" is an overloaded term. Whenever you use the word, check whether your audience uses the same definition.
+The word _container_ is an overloaded term. Whenever you use the word, check whether your audience uses the same definition.
 
 Each container that you run is repeatable; the standardization from having
 dependencies included means that you get the same behavior wherever you