MNT: Upgrade Python and unpin requirements

[fepegar]

[codecov[bot]]

Codecov Report

Merging #851 (a812de8) into main (82342ca) will increase coverage by 0.02%. The diff coverage is n/a.

Flag	Coverage Δ
hi-ml-multimodal	89.23% <ø> (+0.10%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...l/src/health_multimodal/image/model/transformer.py	94.96% <ø> (+0.03%)	:arrow_up:

... and 3 files with indirect coverage changes

[fepegar]

Superseded by

• https://github.com/microsoft/hi-ml/pull/928