chore(deps): bump types-markdown from 3.8.0.20250415 to 3.8.0.20250708 (#172)

Bumps
[types-markdown](https://github.com/typeshed-internal/stub_uploader)
from 3.8.0.20250415 to 3.8.0.20250708.
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Author: Marenz

pyproject.toml

@@ -83,7 +83,7 @@ dev-mypy = [
   "mypy == 1.17.1",
   "grpc-stubs == 1.53.0.6",
   "pandas-stubs == 2.3.0.250703",
-  "types-Markdown == 3.8.0.20250415",
+  "types-Markdown == 3.8.0.20250809",
   "types-protobuf == 6.30.2.20250703",
   # For checking the noxfile, docs/ script, and tests
   "frequenz-client-electricity-trading[dev-mkdocs,dev-noxfile,dev-pytest]",