upgrade openai dep to v2.9.0 (#2177)

---
[//]: # (BEGIN SAPLING FOOTER)
* #2178
* __->__ #2177

Author: rm-openai

pyproject.toml

@@ -7,7 +7,7 @@ requires-python = ">=3.9"
 license = "MIT"
 authors = [{ name = "OpenAI", email = "[email protected]" }]
 dependencies = [
-    "openai>=2.8.0,<3",
+    "openai>=2.9.0,<3",
     "pydantic>=2.12.3, <3",
     "griffe>=1.5.6, <2",
     "typing-extensions>=4.12.2, <5",