build(deps-dev): bump types-markdown from 3.10.2.20260211 to 3.10.2.20260408 (#572)

Bumps [types-markdown](https://github.com/python/typeshed) from
3.10.2.20260211 to 3.10.2.20260408.
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Author: frequenz-auto-dependabot[bot]

pyproject.toml

@@ -90,7 +90,7 @@ dev-mkdocs = [
 dev-mypy = [
   "mypy == 1.20.2",
   "types-setuptools >= 67.6.0, < 83", # Should match the api dependency
-  "types-Markdown == 3.10.2.20260211",
+  "types-Markdown == 3.10.2.20260408",
   "types-PyYAML == 6.0.12.20260408",
   "types-babel == 2.11.0.15",
   "types-colorama == 0.4.15.20260408",