Merge pull request #5893 from dev-hato/renovate/discord.py-2.x

fix(deps): update dependency discord.py to v2.6.4

Author: renovate[bot]

pyproject.toml

@@ -14,7 +14,7 @@ dependencies = [
     "pandas==2.3.3",
     "matplotlib==3.10.6",
     "openai==2.2.0",
-    "discord.py==2.6.3",
+    "discord.py==2.6.4",
     "misskey.py==4.1.0",
     "websockets==15.0.1",
     "flask==3.1.2",