Merge pull request #4560 from dev-hato/renovate/matplotlib-3.x

chore(deps): update dependency matplotlib to v3.9.4

Author: renovate[bot]

Pipfile

@@ -31,7 +31,7 @@ slack-bolt = "==1.21.3"
 slack-sdk = "==3.33.5"
 gitpython = "==3.1.43"
 pandas = "==2.2.3"
-matplotlib = "==3.9.3"
+matplotlib = "==3.9.4"
 openai = "==1.57.3"
 "discord.py" = "==2.4.0"
 "misskey.py" = "==4.1.0"