chore(deps): update dependency openai to v1.99.9

Author: renovate[bot]

projects/sudoku/requirements.txt

@@ -11,7 +11,7 @@ httpx==0.28.1
 idna==3.10
 jiter==0.10.0
 markdownify==1.1.0
-openai==1.99.5
+openai==1.99.9
 pydantic==2.11.7
 pydantic_core==2.33.2
 python-dotenv==1.1.1