[air](deps): Bump deltalake in /python/requirements/ml

Bumps [deltalake](https://github.com/delta-io/delta-rs) from 0.9.0 to 1.2.1.
- [Release notes](https://github.com/delta-io/delta-rs/releases)
- [Changelog](https://github.com/delta-io/delta-rs/blob/main/CHANGELOG.md)
- [Commits](delta-io/delta-rs@rust-v0.9.0...python-v1.2.1)

---
updated-dependencies:
- dependency-name: deltalake
  dependency-version: 1.2.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

python/requirements/ml/data-test-requirements.txt

@@ -15,7 +15,7 @@ webdataset
 raydp==1.7.0b20250423.dev0
 pylance==0.22
 delta-sharing
-deltalake==0.9.0
+deltalake==1.2.1
 pytest-mock
 decord
 snowflake-connector-python>=3.15.0