Update comments with correct port

[hughxia]

Description

Update the commonts with correct port

Issue reference

Please reference the issue this PR will close: #899

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• The quickstart code compiles correctly
• You've tested new builds of the quickstart if you changed quickstart code
• You've updated the quickstart's README if necessary
• If you have changed the steps for a quickstart be sure that you have updated the automated validation accordingly. All of our quickstarts have annotations that allow them to be executed automatically as code. For more information see mechanical-markdown. For user guide with examples see Examples.

[rabollin]

Reviewed the change and fixing comment is good enough. dapr.yml & the actual code is correctly referencing the app port as 6006.

[msfussell]

LGTM