add suggested changes from Mike

Author: nginx-jack

README.md

@@ -6,21 +6,18 @@ The action pushes to an Azure Storage Container, and assumed an existing reverse
 
 By default, it will also purge the provided CDN path.
 
-## How to
-
-1. Head to the actions section of your repository, for example https://github.com/yourOrg/yourRepo/actions
-
-1. On the left side, click on Build and deploy (docs)
+## How-to
+These instructions apply only to NGINX GitHub doc repositories.
+1. Navigate to the actions section of your repository, for example https://github.com/yourOrg/yourRepo/actions
+1. On the left side of the page, select Build and deploy (docs). If you don't see this option, follow the [Caller Example](#caller-example).
 ![Build and deploy (docs)](/images/build-and-deploy.png "Build and deploy (docs)")
-1. On the right side, you should now see a Run workflow button
+1. On the right side, you will see a Run workflow button.
 ![Run Workflow](/images/run-workflow.png "Run Workflow")
-1. Clicking this will open a menu which lets you select the branch you want to build, and which environment you'd like to deploy to
-1. Preview will generate a custom url for any branch you want, and will be available in the workflow output.
-All builds, regardless of environment, will print a url to the summary.
+1. Select Run workflow. This opens a menu which lets you select the branch you want to build, and which environment you'd like to deploy to
+1. The preview environment generates a custom URL for your preferred branch, and will be available in the workflow output.
+All builds, regardless of environment, prints an URL to the summary.
 ![Summary](/images/summary.png "Summary")
 
-Preview URLs wil be added as a comment to PRs automatically.
-
 _note: autodeploy from branch is currently in progress. This docs will be updated when available._
 
 ## Usage