Bump ipywidgets from 7.7.1 to 8.0.1 in /requirements (#729)

* Bump ipywidgets from 7.7.1 to 8.0.1 in /requirements

Bumps [ipywidgets](https://github.com/jupyter-widgets/ipywidgets) from 7.7.1 to 8.0.1.
- [Release notes](https://github.com/jupyter-widgets/ipywidgets/releases)
- [Commits](jupyter-widgets/ipywidgets@7.7.1...8.0.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

* Bump max bound

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>

requirements/docs.txt

@@ -1,4 +1,4 @@
 # docs
-ipywidgets==7.7.1
+ipywidgets==8.0.1
 nbsphinx==0.8.9
 sphinx==5.0.2

setup.cfg

@@ -99,7 +99,7 @@ datasets =
     zipfile-deflate64>=0.2,<0.3
 docs =
     # ipywidgets 7+ required by nbsphinx
-    ipywidgets>=7,<8
+    ipywidgets>=7,<9
     # nbsphinx 0.8.5 fixes bug with nbformat attributes
     nbsphinx>=0.8.5,<0.9
     # release versions missing files, must install from master