Update openai requirement from <3,>=2.11.0 to >=2.33.0,<3

Updates the requirements on [openai](https://github.com/openai/openai-python) to permit the latest version.
- [Release notes](https://github.com/openai/openai-python/releases)
- [Changelog](https://github.com/openai/openai-python/blob/main/CHANGELOG.md)
- [Commits](openai/openai-python@v2.11.0...v2.33.0)

---
updated-dependencies:
- dependency-name: openai
  dependency-version: 2.33.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements/base.txt

@@ -46,7 +46,7 @@ pandas
 plasmapdf==0.1.3  # https://github.com/Jsv4/plasmapdf
 pdf2image>=1.16.0
 tiktoken==0.12.0  # https://github.com/openai/tiktoken
-openai>=2.11.0,<3  # https://github.com/openai/openai-python (pydantic-ai 1.x requires >=2.11.0)
+openai>=2.33.0,<3  # https://github.com/openai/openai-python (pydantic-ai 1.x requires >=2.11.0)
 pytesseract
 pydantic-ai>=1.87.0,<2
 spacy