Bump pyarrow from 1.0.1 to 15.0.0 in /examples/research_projects/lxmert (#30584)
Bumps [pyarrow](https://github.com/apache/arrow) from 1.0.1 to 15.0.0.
- [Commits](https://github.com/apache/arrow/compare/apache-arrow-1.0.1...go/v15.0.0)
---
updated-dependencies:
- dependency-name: pyarrow
dependency-type: direct:production
...
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