Bump sphinx-hoverxref from 0.7b1 to 0.8b1 (#1109)

Bumps [sphinx-hoverxref](https://github.com/readthedocs/sphinx-hoverxref) from 0.7b1 to 0.8b1.
- [Release notes](https://github.com/readthedocs/sphinx-hoverxref/releases)
- [Changelog](https://github.com/readthedocs/sphinx-hoverxref/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/readthedocs/sphinx-hoverxref/commits)

---
updated-dependencies:
- dependency-name: sphinx-hoverxref
  dependency-type: direct:development
...

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Author: dependabot[bot]

poetry.lock

@@ -88,7 +88,7 @@ sphinx = "^4.2"
 sphinx-autodoc-typehints = "^1.12"
 sphinxcontrib-mermaid = "0.7.1"
 sphinx-typlog-theme = "^0.8"
-sphinx-hoverxref = "^0.7b1"
+sphinx-hoverxref = "^0.8b1"
 doc8 = "^0.9"
 m2r = "^0.2"
 tomlkit = "^0.7"