fix(deps): update dependency openai to v1.78.1 (#1081)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [openai](https://redirect.github.com/openai/openai-python) |
`==1.70.0` -> `==1.78.1` |
[![age](https://developer.mend.io/api/mc/badges/age/pypi/openai/1.78.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/openai/1.78.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/openai/1.78.1/1.78.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/openai/1.78.1/1.78.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

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pyproject.toml

@@ -6,7 +6,7 @@ readme = "README.md"
 # renovate: datasource=python-version depName=python
 requires-python = ">=3.12, <3.14"
 dependencies = [
-  "openai==1.70.0",
+  "openai==1.78.1",
   "tiktoken<1.0.0,>=0.5.1",
   "tabulate>=0.9.0,<1.0.0",
   "codeowners<1.0.0,>=0.6.0",