Blog post update - Add guided explorations

This is an update to an existing blog to add resource links and can go out as soon as possible and does not need new publicity.

Checklist for writer

• Link to issue added, and set to close when this MR is merged
• Due date and marketing milestone (e.g. Mktg: 2021-03-28) added to title for the desired publish date
• If time sensitive
  • Added ~"priority" label if blog needs to run in the next few days
  • Mentioned @sgittlen to give her a heads up ASAP
• Blog post file formatted correctly, including uploading and embedding in markdown any accompanying images
• All relevant frontmatter included
• Review app checked for any formatting issues
• Reviewed by fellow team member(s)
• Reviewer(s) marked approved before sending to blog team
  • Any required internal or external approval for this blog post has been granted (please leave a comment with details)
  • Reviews by Legal team if necessary according to SAFE guidelines
• Assign to @Sgittlen for final review

After the blog has been published:

• Share on your social media channels
  • Add ?utm_medium=social&utm_campaign=blog&utm_content=advocacy to the end of the blog URL when you share on social media, for data tracking. Your link should look like this:https://about.gitlab.com/blog/20xx/xx/xx/blog-title/?utm_medium=social&utm_campaign=blog&utm_content=advocacy
• After you've shared on your social media profiles, select one of the posts and link it in the #social_media_action Slack channel for everyone to engage with your post. The GitLab social team may engage or even share your social media post to amplify the work.
• To learn more about how to use your own social media channels for GitLab, check out our team member social media guidelines here.