⬆️ Update sphinxext-opengraph requirement

Updates the requirements on [sphinxext-opengraph](https://github.com/wpilibsuite/sphinxext-opengraph) to permit the latest version.
- [Release notes](https://github.com/wpilibsuite/sphinxext-opengraph/releases)
- [Commits](sphinx-doc/sphinxext-opengraph@v0.7.5...v0.8.1)

---
updated-dependencies:
- dependency-name: sphinxext-opengraph
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -61,7 +61,7 @@ rtd = [
     "sphinxext-rediraffe~=0.2.7",
     # TODO this can uncommented once https://github.com/mgaitan/sphinxcontrib-mermaid/issues/109 is fixed
     # "sphinxcontrib.mermaid~=0.7.1",
-    "sphinxext-opengraph~=0.7.5",
+    "sphinxext-opengraph~=0.8.1",
     "sphinx-pyscript",
     "sphinx-tippy>=0.3.1",
     "sphinx-autodoc2~=0.4.2",