Fix markup for 7/23/2019 blog post

[zacharysarah]

This PR fixes broken markup for this blog post.

@JasonHaley 👋 For future reference:

1. Use site shortcodes for callouts

   Specifically, k/website uses custom shortcodes for callouts:

   {{< note >}}
   No need to include a prefix; the shortcode automatically provides one. (Note:, Caution:, etc.)
   {{< /note >}}
   

2. Use single backticks for inline code snippets.

   Only use triple backticks for fencing code samples with newlines:

   This is an `inline code sample`.
   

/assign @mrbobbytables @kbarnard10

/area blog

[netlify]

Deploy preview for kubernetes-io-master-staging ready!

Built with commit 1994f35

https://deploy-preview-15578--kubernetes-io-master-staging.netlify.com

[mrbobbytables]

/lgtm
Thanks again for finding the root problem and fixing it @zacharysarah !

[castrojo]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: castrojo

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• content/en/blog/OWNERS [castrojo]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment