Bump myst-nb from 1.1.0 to 1.1.1 in /docs (#143)

Bumps [myst-nb](https://github.com/executablebooks/myst-nb) from 1.1.0 to 1.1.1.
- [Release notes](https://github.com/executablebooks/myst-nb/releases)
- [Changelog](https://github.com/executablebooks/MyST-NB/blob/master/CHANGELOG.md)
- [Commits](executablebooks/MyST-NB@v1.1.0...v1.1.1)

---
updated-dependencies:
- dependency-name: myst-nb
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

docs/requirements.txt

@@ -2,7 +2,7 @@ sphinx==7.3.7
 sphinx-design==0.6.0
 sphinx-copybutton==0.5.2
 furo==2024.5.6
-myst-nb==1.1.0
+myst-nb==1.1.1
 linkify-it-py==2.0.3
 autodoc-pydantic==2.2.0
 sphinxcontrib-typer==0.3.1