fix(deps): update constraint-dependencies for mistune

Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

pyproject.toml

@@ -19,6 +19,7 @@ constraint-dependencies = [
     "langgraph-sdk>=0.3.15",
     "langsmith>=0.8.18",
     "lxml>=6.1.0",                     # CVE-2026-41066: XML entity expansion with default resolve_entities=True
+    "mistune>=3.3.0",
     "msgpack>=1.2.1",
     "pillow>=12.2.0",                  # CVE-2026-40192 + 4 more: heap overflow, OOB write, DoS
     "protobuf>=5.29.6",               # CVE-2025-4565 + CVE-2026-0994: parsing vulnerabilities