chore(deps): update dependency markdown-it-py to v4

Author: renovate[bot]

dev-requirements.txt

@@ -72,7 +72,7 @@ jsonschema-specifications==2025.4.1
 jwcrypto==1.5.6
 kiwisolver==1.4.8
 lz4==4.4.4
-markdown-it-py==3.0.0
+markdown-it-py==4.0.0
 MarkupSafe==3.0.2
 marshmallow==3.26.1
 matplotlib==3.10.5