Feature 184 - Update UG link to stable version

[fossell]

Expected Differences

• Do these changes modify the system output in any way? [Yes or No]
  
  If yes, please describe:
  

Pull Request Testing

• Describe testing already performed for these changes:
  

• Recommend testing for the reviewer(s) to perform, including the location of input datasets, and any additional instructions:
  

• Do these changes include sufficient documentation updates, ensuring that no errors or warnings exist in the build of the documentation? [Yes or No]

• Do these changes include sufficient testing updates? [Yes or No]

• Will this PR result in changes to the test suite? [Yes or No]
  
  If yes, describe the new output and/or changes to the existing output:
  

• Please complete this pull request review by [Fill in date].
  

Pull Request Checklist

• Review the source issue metadata (labels, project, and milestone).
• Complete the PR definition above.
• Ensure the PR title matches the feature or bugfix branch name.
• Define the PR metadata, as permissions allow.
  Select: Reviewer(s)
  Select: Project
  Select: Milestone as the version that will include these changes
  Select: Development to link to the original development issue.
• After the PR is approved, merge your changes. If permissions do not allow this, request that the reviewer do the merge.
• Close the linked issue and delete your feature or bugfix branch from GitHub.

[fossell]

@hahnd I updated the codecov link, the badge should link directly to the info page with graphs and whatnot for this project. You can review it on the branch here. Please re-approve if this looks good to you.