chore(deps-dev): bump types-markdown from 3.10.2.20260211 to 3.10.2.20260408 (#270)

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

pyproject.toml

@@ -85,7 +85,7 @@ dev-mypy = [
   "mypy == 1.20.0",
   "grpc-stubs == 1.53.0.6",
   "pandas-stubs == 3.0.0.260204",
-  "types-Markdown == 3.10.2.20260211",
+  "types-Markdown == 3.10.2.20260408",
   "types-protobuf == 6.32.1.20260221",
   # For checking the noxfile, docs/ script, and tests
   "frequenz-client-electricity-trading[dev-mkdocs,dev-noxfile,dev-pytest]",