build(deps): bump sphinx-immaterial from 0.12.3 to 0.12.4

Bumps [sphinx-immaterial](https://github.com/jbms/sphinx-immaterial) from 0.12.3 to 0.12.4.
- [Release notes](https://github.com/jbms/sphinx-immaterial/releases)
- [Commits](jbms/sphinx-immaterial@v0.12.3...v0.12.4)

---
updated-dependencies:
- dependency-name: sphinx-immaterial
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pyproject.toml

@@ -60,7 +60,7 @@ dev = [
 
 docs = [
     "sphinx",
-    "sphinx-immaterial==0.12.3",
+    "sphinx-immaterial==0.12.4",
     "sphinx_copybutton",
     "sphinx-autobuild",
     "tornado>=6.3.3"