To access a value by position, use ser.iloc[pos]

[quant12345]

Please confirm that this PR has done the following:

• [ ] Tests Added
• [ ] Documentation Added
• [ ] Name of contributors Added to AUTHORS.rst
• [x] Description in RELEASE_NOTES.md Added

Description of PR

This PR removes the warnings: FutureWarning:

Series.__setitem__ treating keys as positions is deprecated. In a future version, integer keys will always be treated as labels (consistent with DataFrame behavior). To set a value by position, use ser.iloc[pos] = value

tests to check:

pytest tests/test_feature_aggregate.py::test_aggregate_region_with_negative_weights[None]
pytest tests/test_feature_aggregate.py::test_aggregate_region_with_negative_weights[datetime]
pytest tests/test_io.py::test_load_meta_exclude

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.0%. Comparing base (ddbb88e) to head (2fd1cc5). Report is 32 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #880 +/- ## ===================================== Coverage 95.0% 95.0% ===================================== Files 64 64 Lines 6134 6216 +82 ===================================== + Hits 5828 5910 +82 Misses 306 306 ```

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