Description of problem:

serverless-application quick start shows empty prerequisite list item

Prerequisites (if any, like setup, operators/versions):

install serverless operator

Steps to Reproduce

1. navigate to the quick start catalog
2. click on the prerequisite link in the `exploring serverless application`

Actual results:

Expected results:

No prerequisites should be listed for this quick start.

Reproducibility (Always/Intermittent/Only Once):

always

Build Details:

4.8.0-0.nightly-2021-02-23-092027

Additional info:

• quick start rendering could be more defensive and filter empty items
• 
  serverless-application quick start should not contain a pre-requisite list with an empty entry