[CI] Fix CIs

[adam2392]

Thanks for contributing. If this is your first time, make sure to read contributing.md

PR Description

Describe your PR here

Merge checklist

Maintainer, please confirm the following before merging:

• [ ] All comments resolved
• [ ] This is not your own PR
• [ ] All CIs are happy
• [ ] PR title starts with [MRG]
• [ ] whats_new.rst is updated
• [ ] PR description includes phrase "closes <#issue-number>"

[adam2392]

This will fix the CI issues in #163

cc: @tsbinns and @orabe

[adam2392]

There is just one circleCI failure related to getting dipy sphinx objects imported.

Otw, this is good for review/approval

[larsoner]

Looks like you need to update the URL to https://docs.dipy.org/1.8.0

[tsbinns]

Brilliant, thanks @adam2392!