Update dependency markdown-it-py to v4

Author: renovate[bot]

requirements.txt

@@ -11,7 +11,7 @@ PyGithub==2.3.0
 idna==3.6
 importlib_metadata==7.1.0
 jmespath==1.0.1
-markdown-it-py==3.0.0
+markdown-it-py==4.2.0
 mdurl==0.1.2
 oauthlib==3.2.2
 pydantic==2.6.4