Bump jupyter-book from 0.15.1 to 1.0.0 in /docs (#31)

Bumps [jupyter-book](https://github.com/executablebooks/jupyter-book) from 0.15.1 to 1.0.0.
- [Release notes](https://github.com/executablebooks/jupyter-book/releases)
- [Changelog](https://github.com/executablebooks/jupyter-book/blob/master/CHANGELOG.md)
- [Commits](jupyter-book/jupyter-book@v0.15.1...v1.0.0)

---
updated-dependencies:
- dependency-name: jupyter-book
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/requirements.txt

@@ -1,2 +1,2 @@
 docutils==0.17.1
-jupyter-book==0.15.1
+jupyter-book==1.0.0