Update openai requirement from <3,>=2.43.0 to >=2.44.0,<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@v2.43.0...v2.44.0)

---
updated-dependencies:
- dependency-name: openai
  dependency-version: 2.44.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements/base.txt

@@ -40,7 +40,7 @@ drf-extra-fields==3.7.0  # https://github.com/Hipo/drf-extra-fields
 pypdf>=6.14.2,<7  # https://github.com/py-pdf/pypdf
 plasmapdf==0.1.3  # https://github.com/Jsv4/plasmapdf
 pdf2image>=1.17.0
-openai>=2.43.0,<3  # https://github.com/openai/openai-python (pydantic-ai 1.x requires >=2.11.0)
+openai>=2.44.0,<3  # https://github.com/openai/openai-python (pydantic-ai 1.x requires >=2.11.0)
 # Bumping pydantic-ai is a deliberate decision: this codebase relies on the
 # precedence rule that ``instructions=`` (not ``system_prompt=``) is the only
 # way to deliver a system instruction when ``message_history`` is non-empty